Revert "V4L/DVB (6173a): Documentation: Remove reference to dead "cpia_pp=" boot-time option"

This reverts commit 4730d3af.

Unfortunately, patch got mangled by a whitespace removal script.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

Documentation/kernel-parameters.txt

@@ -468,6 +468,9 @@ and is between 256 and 4096 characters. It is defined in the file
 			Format:
 			<first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>]
 
+	cpia_pp=	[HW,PPT]
+			Format: { parport<nr> | auto | none }
+
 	crashkernel=nn[KMG]@ss[KMG]
 			[KNL] Reserve a chunk of physical memory to
 			hold a kernel to switch to with kexec on panic.