docs: kernel-parameters: Fix stale sticore file paths

Update file paths for sticore references that
became stale when drivers were reorganized:
- drivers/video/console/sticore.c -> drivers/video/

Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260531140541.4115641-1-costa.shul@redhat.com>

Author: makelinux

Documentation/admin-guide/kernel-parameters.txt

@@ -7420,10 +7420,10 @@ Kernel parameters
 			Set the STI (builtin display/keyboard on the HP-PARISC
 			machines) console (graphic card) which should be used
 			as the initial boot-console.
-			See also comment in drivers/video/console/sticore.c.
+			See also comment in drivers/video/sticore.c.
 
 	sti_font=	[HW]
-			See comment in drivers/video/console/sticore.c.
+			See comment in drivers/video/sticore.c.
 
 	stifb=		[HW]
 			Format: bpp:<bpp1>[:<bpp2>[:<bpp3>...]]