pinctrl: qcom: handle input-enable pinconf property

This enables support of 'input-enable' pinconf generic property in
the pinctrl driver.

Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Git-commit: 407f5e392f9c5b9c16178c5e6b2112234fdf9fad
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Change-Id: I5ebc7caf91a4221c49816298cfa7dd008bef98c4
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>