omap: correct CPU_TYPE: omaps are cortext-a8

Signed-off-by: Alexander Couzens <[email protected]>

target/linux/omap/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=omap
 BOARDNAME:=TI OMAP3/4/AM33xx
 FEATURES:=usb usbgadget ext4 targz fpu audio display nand ubifs
-CPU_TYPE:=cortex-a9
+CPU_TYPE:=cortex-a8
 CPU_SUBTYPE:=vfpv3
 
 KERNEL_PATCHVER:=4.4