drm/gma500/power: Fix a bunch of *dev documentation issues

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/gma500/power.c:101: warning: Function parameter or member 'pdev' not described in 'gma_resume_display'
 drivers/gpu/drm/gma500/power.c:155: warning: Function parameter or member 'pdev' not described in 'gma_resume_pci'
 drivers/gpu/drm/gma500/power.c:155: warning: Excess function parameter 'dev' description in 'gma_resume_pci'
 drivers/gpu/drm/gma500/power.c:189: warning: Function parameter or member '_dev' not described in 'gma_power_suspend'
 drivers/gpu/drm/gma500/power.c:189: warning: Excess function parameter 'pdev' description in 'gma_power_suspend'
 drivers/gpu/drm/gma500/power.c:189: warning: Excess function parameter 'state' description in 'gma_power_suspend'
 drivers/gpu/drm/gma500/power.c:216: warning: Function parameter or member '_dev' not described in 'gma_power_resume'
 drivers/gpu/drm/gma500/power.c:216: warning: Excess function parameter 'pdev' description in 'gma_power_resume'

Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Benjamin Defnet <benjamin.r.defnet@intel.com>
Cc: Rajesh Poornachandran <rajesh.poornachandran@intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210115181313.3431493-20-lee.jones@linaro.org

drivers/gpu/drm/gma500/power.c

@@ -93,6 +93,7 @@ static void gma_suspend_display(struct drm_device *dev)
 
 /**
  *	gma_resume_display	-	resume display side logic
+ *	@pdev: PCI device
  *
  *	Resume the display hardware restoring state and enabling
  *	as necessary.
@@ -146,7 +147,7 @@ static void gma_suspend_pci(struct pci_dev *pdev)
 
 /**
  *	gma_resume_pci		-	resume helper
- *	@dev: our PCI device
+ *	@pdev: our PCI device
  *
  *	Perform the resume processing on our PCI device state - rewrite
  *	register state and re-enable the PCI device
@@ -178,7 +179,7 @@ static bool gma_resume_pci(struct pci_dev *pdev)
 
 /**
  *	gma_power_suspend		-	bus callback for suspend
- *	@pdev: our PCI device
+ *	@_dev: our device
  *	@state: suspend type
  *
  *	Called back by the PCI layer during a suspend of the system. We
@@ -208,7 +209,7 @@ int gma_power_suspend(struct device *_dev)
 
 /**
  *	gma_power_resume		-	resume power
- *	@pdev: PCI device
+ *	@_dev: our device
  *
  *	Resume the PCI side of the graphics and then the displays
  */