The #endif is placed obviously at a wrong position, which caused a
build error on the big endian machine.

Fixes: 0b5288f5 ("ALSA: ump: Add legacy raw MIDI support")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/r/20230524135448.3ecad334@canb.auug.org.auSigned-off-by: Takashi Iwai <tiwai@suse.de>