platform: mellanox: Cosmetic changes - rename to more common name

Rename 'nvlink_blade' in several declaration to more common name
"chassis_blade", since these names are going to be used for different
kinds of blades.

Fix 'swicth' to 'switch' in comment.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Michael Shych <michaelsh@nvidia.com>
Link: https://lore.kernel.org/r/20230208063331.15560-4-vadimp@nvidia.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>