realtek: Switch to kernel integer types

realtek: Switch to kernel integer types

uint(8|16|32|64)_t and int(8|16|32|64)_t types should not be used in
kernel code. The shorter s(8|16|32|64) and u(8|16|32|64) or the
endianness specific versions (le*, be*) must be used instead.

Signed-off-by: Sven Eckelmann <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20906
Signed-off-by: Hauke Mehrtens <[email protected]>