staging: prima: add option to read calibration data from HTC NVS

Change-Id: Ic10b4891eee4071d6edf7aa7bea2b7994f914b2b

Conflicts:
	drivers/staging/prima/CORE/HDD/src/wlan_hdd_main.c
	drivers/staging/prima/Kconfig
staging: prima: Allow prima_wlan to be built inside kernel

* Prima needs wcnss to be set up when it loads.
  Therefore use a platform_driver in to notify prima that wcnss is ready.

Change-Id: I6c403f705e9dffa524a2aab54453e50775b45264

Conflicts:
	drivers/staging/prima/CORE/HDD/src/wlan_hdd_main.c