media: atomisp: Fix spelling mistake in isp2400_input_system_global.h

media: atomisp: Fix spelling mistake in isp2400_input_system_global.h

The script checkpatch.pl reported a spelling error
in isp2400_input_system_global.h as below:

'''
WARNING: 'upto' may be misspelled - perhaps 'up to'?
//MIPI allows upto 4 channels.
              ^^^^
'''

This patch corrects a spelling error,
changing "upto" to "up to".

Link: https://lore.kernel.org/r/20231222201503.2337-1-kdipendra88@gmail.com
Signed-off-by: Dipendra Khadka <kdipendra88@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>