Convert CONFIG_SYS_BR0_PRELIM et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_BR0_PRELIM
   CONFIG_SYS_OR1_PRELIM
   CONFIG_SYS_BR1_PRELIM
   CONFIG_SYS_OR2_PRELIM
   CONFIG_SYS_BR2_PRELIM
   CONFIG_SYS_OR2_PRELIM
   CONFIG_SYS_BR3_PRELIM
   CONFIG_SYS_OR3_PRELIM
   CONFIG_SYS_BR4_PRELIM
   CONFIG_SYS_OR4_PRELIM
   CONFIG_SYS_BR5_PRELIM
   CONFIG_SYS_OR5_PRELIM
   CONFIG_SYS_BR6_PRELIM
   CONFIG_SYS_OR6_PRELIM
   CONFIG_SYS_BR7_PRELIM
   CONFIG_SYS_OR7_PRELIM

This also introduces CONFIG_SYS_BR0_PRELIM_BOOL as not all platforms
that can set these values do so.  Add the relevant SYS_BRx_PRELIM_BOOL
to platforms that had not been previously migrated.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/MPC8548CDS_legacy_defconfig b/configs/MPC8548CDS_legacy_defconfig
index 45f007e..93b9364 100644
--- a/configs/MPC8548CDS_legacy_defconfig
+++ b/configs/MPC8548CDS_legacy_defconfig
@@ -30,6 +30,18 @@
 CONFIG_DM=y
 CONFIG_DDR_ECC=y
 CONFIG_ECC_INIT_VIA_DDRCONTROLLER=y
+CONFIG_SYS_BR0_PRELIM_BOOL=y
+CONFIG_SYS_BR0_PRELIM=0xFF801001
+CONFIG_SYS_OR0_PRELIM=0xFF806E65
+CONFIG_SYS_BR1_PRELIM_BOOL=y
+CONFIG_SYS_BR1_PRELIM=0xFF001001
+CONFIG_SYS_OR1_PRELIM=0xFF806E65
+CONFIG_SYS_BR2_PRELIM_BOOL=y
+CONFIG_SYS_BR2_PRELIM=0xF0001861
+CONFIG_SYS_OR2_PRELIM=0xFC006901
+CONFIG_SYS_BR3_PRELIM_BOOL=y
+CONFIG_SYS_BR3_PRELIM=0xF8000801
+CONFIG_SYS_OR3_PRELIM=0xFFF00FF7
 CONFIG_DM_I2C=y
 CONFIG_I2C_SET_DEFAULT_BUS_NUM=y
 CONFIG_SYS_I2C_FSL=y