There was a requirement from client drivers to create ramdump
device with a given name so that they control the name of the elf.
This change adds the support to create/destroy ramdump device.
Change-Id: I411cc92a1b41d44e8b6fef95d383613280dae0c2
Signed-off-by: Mukesh Ojha <quic_mojha@quicinc.com>