meson: fix pl111 dependency on vc4

src/gallium/winsys/pl111/drm/libpl111winsys.a(pl111_drm_winsys.c.o): In function `pl111_drm_screen_create':
pl111_drm_winsys.c:(.text+0x33): undefined reference to `vc4_drm_screen_create_renderonly'

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>

meson.build

@@ -190,6 +190,9 @@ endif
 if with_gallium_imx and not with_gallium_etnaviv
   error('IMX driver requires etnaviv driver')
 endif
+if with_gallium_pl111 and not with_gallium_vc4
+  error('pl111 driver requires vc4 driver')
+endif
 
 dep_libdrm_intel = []
 if with_dri_i915 or with_gallium_i915

src/gallium/meson.build

@@ -72,17 +72,17 @@ if with_gallium_freedreno
 else
   driver_freedreno = declare_dependency()
 endif
-if with_gallium_pl111
-  subdir('winsys/pl111/drm')
-else
-  driver_pl111 = declare_dependency()
-endif
 if with_gallium_vc4
   subdir('winsys/vc4/drm')
   subdir('drivers/vc4')
 else
   driver_vc4 = declare_dependency()
 endif
+if with_gallium_pl111
+  subdir('winsys/pl111/drm')
+else
+  driver_pl111 = declare_dependency()
+endif
 if with_gallium_vc5
   subdir('winsys/vc5/drm')
   subdir('drivers/vc5')

src/gallium/winsys/pl111/drm/meson.build

@@ -27,6 +27,7 @@ libpl111winsys = static_library(
   ],
   c_args : [c_vis_args],
   dependencies: dep_libdrm,
+  link_with : libvc4winsys,
 )
 
 driver_pl111 = declare_dependency(