The global variable 'PLL_48K_RATE' is never used
so just remove it.
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190808032552.45360-1-yuehaibing@huawei.comSigned-off-by: NMark Brown <broonie@kernel.org>