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: 2938804
Change-Id: I7d5575ecdf4c1c3b329e6bf49586771e37611e5a
Signed-off-by: shiwgupt <shiwgupt@codeaurora.org>