omap3 flash: rename board-sdp-flash.c to be use by other boards

rename board-sdp-flash.c(board-flash.c) and board-sdp.h(board-flash.h) to
used by other board e.g. zoom

Signed-off-by: Sukumar Ghorai <s-ghorai@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 0db90ff..9abefcc 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -121,7 +121,7 @@
 					   hsmmc.o
 obj-$(CONFIG_MACH_OMAP_3430SDP)		+= board-3430sdp.o \
 					   hsmmc.o \
-					   board-sdp-flash.o
+					   board-flash.o
 obj-$(CONFIG_MACH_NOKIA_N8X0)		+= board-n8x0.o
 obj-$(CONFIG_MACH_NOKIA_RX51)		+= board-rx51.o \
 					   board-rx51-sdram.o \