arm: Introduce arch/arm/mach-omap2 for OMAP2 derivative platforms

This moves what was in arch/arm/cpu/armv7/omap-common in to
arch/arm/mach-omap2 and moves
arch/arm/cpu/armv7/{am33xx,omap3,omap4,omap5} in to arch/arm/mach-omap2
as subdirectories.  All refernces to the former locations are updated to
the current locations.  For the logic to decide what our outputs are,
consolidate the tests into a single config.mk rather than including 4.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/am3517_evm.h b/include/configs/am3517_evm.h
index a4ae545..2178c8a 100644
--- a/include/configs/am3517_evm.h
+++ b/include/configs/am3517_evm.h
@@ -341,6 +341,6 @@
 #define CONFIG_SPL_NAND_BASE
 #define CONFIG_SPL_NAND_DRIVERS
 #define CONFIG_SPL_NAND_ECC
-#define CONFIG_SPL_LDSCRIPT		"$(CPUDIR)/omap-common/u-boot-spl.lds"
+#define CONFIG_SPL_LDSCRIPT		"arch/arm/mach-omap2/u-boot-spl.lds"
 
 #endif /* __CONFIG_H */