FROMGIT: tty: serial: qcom-geni-serial: Add support for Hibernation feature

Added changes to support the hibernation feature for serial UART.
Added support for freeze, restore and thaw callbacks to put the
device into hibernation.

Signed-off-by: Aniket Randive <quic_arandive@quicinc.com>
Link: https://lore.kernel.org/r/1665123780-20557-1-git-send-email-quic_arandive@quicinc.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

(cherry picked from commit 35781d83 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/

 tty-next)

Bug: 249193227
Change-Id: I3af4deebe1029e7463add27a5dd86f3eb46a6917
Signed-off-by: Aniket Randive <quic_arandive@quicinc.com>