platform/x86: apple-gmux: Update apple_gmux_detect documentation

Commit fc83fbc80e1a ("platform/x86: apple-gmux: refactor gmux types")
neglected to update the documentation of apple_gmux_detect's arguments.
Update the documentation to reflect that commit's changes.

include/linux/apple-gmux.h:99: warning:
	Function parameter or member 'type_ret' not described in 'apple_gmux_detect'
include/linux/apple-gmux.h:99: warning:
	Excess function parameter 'indexed_ret' description in 'apple_gmux_detect'
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/lkml/20230309122822.77435e33@canb.auug.org.au/
Fixes: fc83fbc80e1a ("platform/x86: apple-gmux: refactor gmux types")
Signed-off-by: Orlando Chamberlain <orlandoch.dev@gmail.com>
Link: https://lore.kernel.org/r/20230309104353.10905-1-orlandoch.dev@gmail.comReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

include/linux/apple-gmux.h

@@ -86,7 +86,7 @@ static inline bool apple_gmux_is_mmio(unsigned long iostart)
  * apple_gmux_detect() - detect if gmux is built into the machine
  *
  * @pnp_dev:     Device to probe or NULL to use the first matching device
- * @indexed_ret: Returns (by reference) if the gmux is indexed or not
+ * @type_ret: Returns (by reference) the apple_gmux_type of the device
  *
  * Detect if a supported gmux device is present by actually probing it.
  * This avoids the false positives returned on some models by