remove extraneous gpio_free() call

the gpio_request() call above the gpio_free() call was commented out.
Removing the call stopped the gpio_ensure_requested warning from
being thrown

Change-Id: Iaa641ed757086f5355c0a2be5de3bd88190583e7
rt5501: Reduce gain to -6dB, turn additonal noise gate on

Conflicts:
	drivers/i2c/chips/rt5501.c