cnss2: Fix for WL_EN toggling failure

Regulator_enable API is getting called twice for wl_en.
But for wlan driver unload, regulator_disable gets called only once.
Hence SoC reset is not happening during the wlan driver unload.
Removed the second regulator_enable call in wlan driver load path.

Change-Id: Ic84a04a5ea01ddf81f27fcaa1579611655ccdd05
Signed-off-by: Jayachandran Sreekumaran <jsreekum@codeaurora.org>