msm: 8974: set up and enable i2c-2 qup bus

To enable i2c-2 bus, clocks and gpios must be configured. An SPI
bus was previously mapped to i2c-2's interrupts and address,
so it had to be removed.

Change-Id: I2ab4d4eae77b050dcd4730d1a6585a95c1a9a420
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>