soc: qcom: boot_marker: clean cold boot markers during hibernation

Having both cold boot and hibernation markers together
is confusing. Delete all cold boot marker during
hibernation restore.

Change-Id: I6f0f55efba66a17b5d6dd70356ca26f06803c6bc
Signed-off-by: Atul Raut <araut@codeaurora.org>