staging: rtl8723bs: Rename variables

staging: rtl8723bs: Rename variables

Rename the variable `mediaStatus` to `media_status` and variable
`lpsVal` to `lps_val` to adhere to Linux kernel coding
standards by using snake_case instead of CamelCase.

Fixes checkpatch.pl warning:
	CHECK: Avoid CamelCase: <mediaStatus>
	CHECK: Avoid CamelCase: <lpsVal>

Signed-off-by: Erick Karanja <karanja99erick@gmail.com>
Link: https://lore.kernel.org/r/20250326132649.22055-1-karanja99erick@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>