realtek: Enclose complex macros in parentheses

realtek: Enclose complex macros in parentheses

The macros will be inserted as is by the pre-compiler into places which
uses them. This can cause weird effects because this can break the syntax
or the ordering of operations. Just adding parentheses can avoid a lot of
these unexpected effects.

(for even more complex, multi-expression macros, `do {...} while (0)` is
required).

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