media: atomisp: Fix spelling mistakes in sh_css_mipi.c

media: atomisp: Fix spelling mistakes in sh_css_mipi.c

codespell reported following spelling mistake
in sh_css_mipi.c as below:

'''
./sh_css_mipi.c:177: separatelly ==> separately
./sh_css_mipi.c:540: ofset ==> offset, of set
'''
This patch fixes these spelling mistakes by changing
"separatelly" to "separately" and "ofset" to "offset".

Link: https://lore.kernel.org/r/20231223064152.79712-1-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>