This patch
 - refactors gpmc_hwecc_bch_capable()
 - add checks for new platforms like dra7xx, am43xx
 - add checks for OMAP3 SoC, w.r.t. new ECC schemes spawned in following commit:
    commit ac65caf5
    ARM: OMAP2+: cleaned-up DT support of various ECC schemes
Signed-off-by: NPekon Gupta <pekon@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>