CHROMIUM: arm64: qcom: mistral: fix APPS_BUCK_EN gpio number

Fix APPS_BUCK_EN gpio number.
According to schematics, APPS_BUCK_EN is gpio4 and not gpio6.

gpio6 is APPS_MODE_SEL, which is also correctly described in device tree.
They cannot both be assigned to gpio6, so this is a clearly a typo.

Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org>

BUG=b:129558664
TEST=Validate DVFS and schedutil governor
Git-repo: https://git.linaro.org/people/niklas.cassel/kernel.git


Git-commit: 3ab918fbcc600b0d937f8422c8f2a231251c2391
Signed-off-by: Praveen Koya <pkoya@codeaurora.org>

Change-Id: If11a09b0598656f4f90c83955752378a460e96a3
Signed-off-by: Vamsi Singamsetty <vamssi@codeaurora.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/1663469


Reviewed-by: Zhihong Yu <zhihongyu@chromium.org>
Commit-Queue: Zhihong Yu <zhihongyu@chromium.org>
Tested-by: Zhihong Yu <zhihongyu@chromium.org>