staging: rtl8723bs: fix coding style issues in core/rtw_mlme.c

staging: rtl8723bs: fix coding style issues in core/rtw_mlme.c

Fix blank line issues in coding style:
- Remove unnecessary blank lines after an open brace '{'.
- Remove unnecessary blank lines before a closing brace '}'.
- Add missing blank lines after variable declarations.
- Add blank lines after function, struct, union, and enum declarations.

Signed-off-by: Nino Zhang <ninozhang001@gmail.com>
Link: https://lore.kernel.org/r/20250818152641.106740-1-ninozhang001@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>