hw/block/nvme: align with existing style

hw/block/nvme: align with existing style

While QEMU coding style prefers lowercase hexadecimals in constants, the
NVMe subsystem uses the format from the NVMe specifications in comments,
i.e. 'h' suffix instead of '0x' prefix.

Fix this up across the code base.

Signed-off-by: Gollu Appalanaidu <anaidu.gollu@samsung.com>
[k.jensen: updated message; added conversion in a couple of missing comments]
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
(cherry picked from commit 312c3531bba416e589f106db8c8241fc6e7e6332)
*context dependency for 2b02aabc9d
Signed-off-by: Michael Roth <michael.roth@amd.com>