tegra20: enable SPL for tegra20 boards

Add SPL options to tegra20 config files and enable SPL build for
tegra20 boards.  Also remove redundant code from u-boot that is not
contained in SPL.

Signed-off-by: Allen Martin <amartin@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/boards.cfg b/boards.cfg
index 64b0a30..3319298 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -265,10 +265,10 @@
 smdk5250		     arm	 armv7	     smdk5250		 samsung	exynos
 smdkv310		     arm	 armv7	     smdkv310		 samsung	exynos
 trats                        arm         armv7       trats               samsung        exynos
-harmony                      arm         armv7       harmony             nvidia         tegra20
-seaboard                     arm         armv7       seaboard            nvidia         tegra20
-ventana                      arm         armv7       ventana             nvidia         tegra20
-whistler                     arm         armv7       whistler            nvidia         tegra20
+harmony                      arm         armv7:arm720t harmony           nvidia         tegra20
+seaboard                     arm         armv7:arm720t seaboard          nvidia         tegra20
+ventana                      arm         armv7:arm720t ventana           nvidia         tegra20
+whistler                     arm         armv7:arm720t whistler          nvidia         tegra20
 u8500_href                   arm         armv7       u8500               st-ericsson    u8500
 snowball                     arm         armv7       snowball               st-ericsson    u8500
 actux1_4_16                  arm         ixp         actux1              -              -           actux1:FLASH2X2
@@ -295,11 +295,11 @@
 zipitz2                      arm         pxa
 colibri_pxa270               arm         pxa         -                   toradex
 jornada                      arm         sa1100
-plutux                       arm         armv7       plutux              avionic-design tegra20
-medcom                       arm         armv7       medcom              avionic-design tegra20
-tec                          arm         armv7       tec                 avionic-design tegra20
-paz00                        arm         armv7       paz00               compal         tegra20
-trimslice                    arm         armv7       trimslice           compulab       tegra20
+plutux                       arm         armv7:arm720t plutux            avionic-design tegra20
+medcom                       arm         armv7:arm720t medcom            avionic-design tegra20
+tec                          arm         armv7:arm720t tec               avionic-design tegra20
+paz00                        arm         armv7:arm720t paz00             compal         tegra20
+trimslice                    arm         armv7:arm720t trimslice         compulab       tegra20
 atngw100                     avr32       at32ap      -                   atmel          at32ap700x
 atstk1002                    avr32       at32ap      atstk1000           atmel          at32ap700x
 atstk1003                    avr32       at32ap      atstk1000           atmel          at32ap700x