can: sja1000_platform: Remove comma after sentinel-entry in match-table

Since sentinel is the last entry and we do not expect further entries
following it, remove the comma.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Link: https://patch.msgid.link/20260904043724.2955444-8-s-vadapalli@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>