ARM: OMAP5: Rename omap5_evm to omap5_uevm

The omap5-uevm is the reference board name for OMAP5 soc
based platform. So rename it accordingly.

Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Sricharan R <r.sricharan@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>

boards.cfg

@@ -295,7 +295,7 @@ twister                      arm         armv7       twister             technex
 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
+omap5_uevm                   arm         armv7       omap5_uevm          ti		omap5
 dra7xx_evm		     arm	 armv7	     dra7xx		 ti	        omap5
 s5p_goni                     arm         armv7       goni                samsung        s5pc1xx
 smdkc100                     arm         armv7       smdkc100            samsung        s5pc1xx