imx:mx6slevk implement power init board

Implement power_init_board and related I2C interface configuration.

After adding this, uboot can successfully detect and configure pmic.

"
U-Boot 2015.01-00281-ge29eddf (Feb 12 2015 - 09:24:01)

CPU:   Freescale i.MX6SL rev1.0 at 396 MHz
Reset cause: POR
Board: MX6SLEVK
I2C:   ready
DRAM:  1 GiB
PMIC:  PFUZE100 ID=0x10
MMC:   FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2
"

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
1 file changed