update OMAP Kconfig help texts for all supported SoC models

update OMAP Kconfig help texts for all supported SoC models

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 553b7cf..15b603c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -813,7 +813,7 @@
 	select GENERIC_CLOCKEVENTS
 	select ARCH_HAS_HOLES_MEMORYMODEL
 	help
-	  Support for TI's OMAP platform (OMAP1 and OMAP2).
+	  Support for TI's OMAP platform (OMAP1/2/3/4).
 
 config PLAT_SPEAR
 	bool "ST SPEAr"