zlogger: Fix int-conversion error with gcc-14

zlogger: Fix int-conversion error with gcc-14

It's failed because of type casting as  unsigned long.
p is already pointer type, so it doesn't need to cast.
- It can already notice as warning with gcc13.

[   28s] /home/abuild/rpmbuild/BUILD/linux-tizen-modules-7.5.0/kernel/zlogger/zlogger.c:502:29: error: passing argument 1 of 'virt_to_pfn' makes pointer from integer without a cast [-Wint-conversion]
[   28s] /home/abuild/rpmbuild/BUILD/linux-tizen-modules-7.5.0/kernel/zlogger/zlogger.c:557:29: error: passing argument 1 of 'virt_to_pfn' makes pointer from integer without a cast [-Wint-conversion]
[   28s] /home/abuild/rpmbuild/BUILD/linux-tizen-modules-7.5.0/kernel/zlogger/zlogger.c:617:29: error: passing argument 1 of 'virt_to_pfn' makes pointer from integer without a cast [-Wint-conversion]
[   28s] /home/abuild/rpmbuild/BUILD/linux-tizen-modules-7.5.0/kernel/zlogger/zlogger.c:1038:37: error: passing argument 1 of 'virt_to_pfn' makes pointer from integer without a cast [-Wint-conversion]

Change-Id: Id54c9cfada32d292998e4be2b88877511e4a5da3
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>