New board support: Nokia RX-51 aka N900

Based on previous work by: Alistair Buxton <a.j.buxton@gmail.com>

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Cc: Ивайло Димитров <freemangordon@abv.bg>
diff --git a/boards.cfg b/boards.cfg
index a1bae06..92eb778 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -269,6 +269,7 @@
 mcx                          arm         armv7       mcx                 htkw           omap3
 tricorder                    arm         armv7       tricorder           corscience     omap3
 twister                      arm         armv7       twister             technexion     omap3
+nokia_rx51                   arm         armv7       rx51                nokia          omap3
 omap4_panda                  arm         armv7       panda               ti             omap4
 omap4_sdp4430                arm         armv7       sdp4430             ti             omap4
 omap5_evm                    arm         armv7       omap5_evm           ti		omap5