pinctrl: qcom: msmcobalt: Split function groups for mirrorA and mirrorB

Split functions into groups corresponding to mirrorA and
mirrorB. This will help identify which function is selected
on customer devices, making easier to debug potential issues
that may arise due to a wrong function group being selected

Change-Id: I2edc31698544b4647417c2091242f3178c23dbb5
Signed-off-by: Sanrio Alvares <salvares@codeaurora.org>