mtd: use MTD_NAND_OMAP2 for OMAP4
mtd: use MTD_NAND_OMAP2 for OMAP4

use MTD_NAND_OMAP2 also for OMAP4 arch.
testes with omap4430

Signed-off-by: Jan Weitzel <ba7741b7fb3fdea2ed4648935ce07a7b34d05760@phytec.de>
Signed-off-by: Artem Bityutskiy <2f96f8cd3e2780a209d0ab27d1b44624d0019d3f@intel.com>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs