iwlwifi: remove redundant reading from NVM file

The driver reads xtal_calib from NVM file, but actually never uses it.
This is only used in dvm driver.

type=cleanup
ticket=none

Change-Id: I7d7b73dccb793e220f023e0d049b082b043ca95e
Signed-off-by: Chaya Rachel Ivgi <chaya.rachel.ivgi@intel.com>
Reviewed-on: https://git-amr-3.devtools.intel.com/gerrit/137995
Reviewed-by: ec ger unix iil jenkins <EC.GER.UNIX.IIL.JENKINS@INTEL.COM>
Tested-by: ec ger unix iil jenkins <EC.GER.UNIX.IIL.JENKINS@INTEL.COM>
Reviewed-by: Coelho, Luciano <luciano.coelho@intel.com>
x-iwlwifi-stack-dev: 9af834fb9122604b5491fb9735b940c238d34ea9
2 files changed