i2c: xgene-slimpro: Migrate to use generic PCC shmem related macros

mainline inclusion
from mainline-v6.7-rc1
commit 89a4ad1f437c049534891c3d83cd96d7c7debd2a
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8GQ30
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=89a4ad1f437c049534891c3d83cd96d7c7debd2a



--------------------------------

Use the newly defined common and generic PCC shared memory region
related macros in this driver to replace the locally defined ones.

Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Acked-by: Wolfram Sang <wsa@kernel.org>
Link: https://lore.kernel.org/r/20230927-pcc_defines-v2-2-0b8ffeaef2e5@arm.com


Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>