msm: camera: flash: Add support for I2C flash

- Add Regulator power up for I2C flash
- Add GPIO support in probe call for I2C flash
- Add flash type in query capability call of flash.

CRs-Fixed: 3660915
Change-Id: I64ecba3fa4176972e819b11f2a65340c24f85d4f
Signed-off-by: shiwgupt <shiwgupt@codeaurora.org>