Specify a pinctrl configuration for PMK8550 GPIO 3 to enable
alt_sleep_clk output so that clients like WLAN and BT can
function properly.
Change-Id: I74506946647b55e391a8c848c44ccf20af966739
Signed-off-by: Subbaraman Narayanamurthy <quic_subbaram@quicinc.com>