kernel/config: Enable support for VMware Virtual GPU

which the Xorg vmware driver binds to.
Used by the default emulated graphics card in VirtualBox (VMSVGA).
Need to "Enable framebuffer console under vmwgfx by default"
(CONFIG_DRM_VMWGFX_FBCON) otherwise screen goes blank after
system goes multiuser, though system is still functional.

Author: sevan

kernel/config

@@ -875,6 +875,7 @@ CONFIG_ARCH_HAS_PKEYS=y
 # CONFIG_PERCPU_STATS is not set
 # CONFIG_GUP_BENCHMARK is not set
 CONFIG_ARCH_HAS_PTE_SPECIAL=y
+CONFIG_MAPPING_DIRTY_HELPERS=y
 # end of Memory Management options
 
 CONFIG_NET=y
@@ -2890,6 +2891,8 @@ CONFIG_DRM_FBDEV_OVERALLOC=100
 # CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM is not set
 # CONFIG_DRM_LOAD_EDID_FIRMWARE is not set
 # CONFIG_DRM_DP_CEC is not set
+CONFIG_DRM_TTM=m
+CONFIG_DRM_TTM_DMA_PAGE_POOL=y
 
 #
 # I2C encoder or helper chips
@@ -2944,7 +2947,8 @@ CONFIG_DRM_I915_TIMESLICE_DURATION=1
 
 # CONFIG_DRM_VGEM is not set
 # CONFIG_DRM_VKMS is not set
-# CONFIG_DRM_VMWGFX is not set
+CONFIG_DRM_VMWGFX=m
+CONFIG_DRM_VMWGFX_FBCON=y
 # CONFIG_DRM_GMA500 is not set
 # CONFIG_DRM_UDL is not set
 # CONFIG_DRM_AST is not set