ARM: OMAP2+: Enable ARCH_MULTIPLATFORM support

Flip on multiplatform support for omap2+.

No changes to omap2plus_defconfig needed, but please note
that you may need to update your custom config files to
make sure you have:

CONFIG_ARCH_MULTIPLATFORM=y
CONFIG_ARCH_MULTI_V7=y
CONFIG_ARCH_OMAP2PLUS=y

And may need CONFIG_ARCH_MULTI_V6=y if booting omap2 boards.

Cc: Russell King <linux@arm.linux.org.uk>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 67874b8..a1f8868 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -937,17 +937,24 @@
 	help
 	  Support for TI's DaVinci platform.
 
-config ARCH_OMAP
-	bool "TI OMAP"
+config ARCH_OMAP1
+	bool "TI OMAP1"
 	depends on MMU
 	select ARCH_HAS_CPUFREQ
 	select ARCH_HAS_HOLES_MEMORYMODEL
+	select ARCH_OMAP
 	select ARCH_REQUIRE_GPIOLIB
+	select CLKDEV_LOOKUP
 	select CLKSRC_MMIO
 	select GENERIC_CLOCKEVENTS
+	select GENERIC_IRQ_CHIP
 	select HAVE_CLK
+	select HAVE_IDE
+	select IRQ_DOMAIN
+	select NEED_MACH_IO_H if PCCARD
+	select NEED_MACH_MEMORY_H
 	help
-	  Support for TI's OMAP platform (OMAP1/2/3/4).
+	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
 
 config ARCH_VT8500_SINGLE
 	bool "VIA/WonderMedia 85xx"