staging: rtl8723bs: remove redundant 'Adapter' variable in HalPhyRf_8723B

staging: rtl8723bs: remove redundant 'Adapter' variable in HalPhyRf_8723B

The variable Adapter was declared and initialized locally in
an if-statement, but it shadowed a variable of the same name and
value declared in the function scope (line 169).

Removing the inner declaration allows the code to use the existing
outer variable, resolving a -Wshadow warning.

Signed-off-by: Haroen Tmimi <tmimiharoen@gmail.com>
Reviewed-by: Ethan Tidmore <ethantidmore06@gmail.com>
Link: https://patch.msgid.link/20260210185044.53754-1-tmimiharoen@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>