staging: sm750fb: clean-up `else`-blocks

Clean-up `else`-blocks in `hw_sm750_map` that occur after `if`-blocks that
terminate function execution.

Signed-off-by: Eric Florin <ericflorin.kernel@gmail.com>
Link: https://lore.kernel.org/r/20250418035023.27067-1-ericflorin.kernel@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>