Samsung msm7x27: implement vibrator driver
board-samsung-msm7x27: clean up/fix SDCC slot 1 detection

Samsung msm7x27 devices require CONFIG_MMC_MSM_CARD_HW_DETECTION
option with CONFIG_MMC_PARANOID_SD_INIT for slot 1 detection.
board-samsung-msm7x27: fix regulators for wifi