realtek: Avoid line continuations in quoted strings

realtek: Avoid line continuations in quoted strings

It is preferred to have the whole quoted string on a single line to make it
easier to find these lines in the source code (while grep'ing). And since
these quotes are inside  a string, they will also add unwanted whitespaces.

At the same time, add the missing newine at the end of the `pr_debug`
lines.

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