sunxi: introduce NCAT2 generation model

When NCAT2 generation model's introduced for t113, the modification in drivers/mmc/sunxi_mmc.c

• IS_ENABLED(CONFIG_SUNXI_GEN_NCAT2)) && (sdc_no == 2))

in struct mmc *sunxi_mmc_init(int sdc_no) seems to have some negative side effects, meaning enabling 8-bit mode for MMC2. Paticularly, IS_ENABLED(CONFIG_SUNXI_GEN_NCAT2) should not be used for D1/T113 since there is not support for 8-bit mode for MMC2 yet. Therefore, the solution would be to drop this particular change entirely.

Signed-off-by: Okhunjon Sobirjonov Okhunjon.Sobirjonov@Mec-electronics.com