Add PMIC MT6358 VMCH_EINT regulator support. MTK-Commit-Id: 339548814998f2c754c2bf14eb2d05c2c1978257 Signed-off-by: ot_brajesh.singh <ot_brajesh.singh@mediatek.com> CR-Id: ALPS07831506 Feature: pmic_driver Change-Id: Id7bbd2ce5602b32e07e514f7259edc31fed16347 (cherry picked from commit f10ae4be15040b525bcc590f367a050aecff890f)