mec1322: Simplify reading raw I2C pin states
mec1322: Simplify reading raw I2C pin states

Now that gpio_get_level() always returns actual pin states, we can
simplify i2c_raw_get_scl/sda().

BUG=chrome-os-partner:26483
TEST=make buildall
BRANCH=None

Change-Id: Ifefb6fa5da8f566b44c419a0ea5adec41f8925e3
Signed-off-by: Vic Yang <5fd92abeee651458f98e2856f4f200ee971cee4d@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/207057
Reviewed-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>

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