redhat/configs: Fix incorrect configs location and content
These are fixes identified by the Red Hat config files verification
tool: https://gitlab.com/cki-project/kernel-webhooks/-/issues/387
This commit fixes the following problems. Two ':' separators in a row
in priority.rhel file.
Incorrect config file name or content:
fedora/generic/arm/CONFIG_BATTERY_QCOM_BATTMGR=n
fedora/generic/CONFIG_MFD_KHADAS_MCU
rhel/generic/CONFIG_MFD_KHADAS_MCU
Signed-off-by: Vladis Dronov <vdronov@redhat.com>