rt5639: Add extra protection for MCLK det. bit

rt5639: Add extra protection for MCLK det. bit

Added code to ensure MCLK Det and Clock gating bits in MX-FA
register are always set to 1. These bits should never get
overwritten with 0 value.

Bug 200107647

Reviewed-on: http://git-master/r/752511
(cherry picked from commit e74d3d6128403feb823d6a51fd0955199dea1a88)
Change-Id: Idd43c24325b8ffe90ba7aabab513cfebd33ebba9
Signed-off-by: Asha T <atalambedu@nvidia.com>
Signed-off-by: Sharad Gupta <sharadg@nvidia.com>
Reviewed-on: http://git-master/r/758966
Reviewed-by: Dara Ramesh <dramesh@nvidia.com>