drm/i915: Clean up PXP Kconfig info.

During the review I focused on stop the using of the "+"
to reference the newer platforms, but I forgot that we are
in a process of making things more clear and differentiate
graphics and display versions. So, let me to clean up this
a bit. Also, we don't need any version mentioned in the
config menu entry, only in the help.

Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211015090916.82968-1-rodrigo.vivi@intel.com

drivers/gpu/drm/i915/Kconfig

@@ -132,15 +132,15 @@ config DRM_I915_GVT_KVMGT
 	  Intel GVT-g.
 
 config DRM_I915_PXP
-	bool "Enable Intel PXP support for Intel Gen12 and newer platform"
+	bool "Enable Intel PXP support"
 	depends on DRM_I915
 	depends on INTEL_MEI && INTEL_MEI_PXP
 	default n
 	help
-	  PXP (Protected Xe Path) is an i915 component, available on GEN12 and
-	  newer GPUs, that helps to establish the hardware protected session and
-	  manage the status of the alive software session, as well as its life
-	  cycle.
+	  PXP (Protected Xe Path) is an i915 component, available on graphics
+	  version 12 and newer GPUs, that helps to establish the hardware
+	  protected session and manage the status of the alive software session,
+	  as well as its life cycle.
 
 menu "drm/i915 Debugging"
 depends on DRM_I915