pfr-manager: Suppress i2c exception messages in readCPLDReg

Add support to suppress exception messages occurred during i2c operation
when non-pfr CPLD is present.

Tested:

Verified that exceptions were masked.

Signed-off-by: Chalapathi Venkataramashetty <chalapathix.venkataramashetty@intel.com>
Change-Id: Id8f910e0da2eee18f00253883fcefe845f3fca69
1 file changed