meson: Don't build svgadrm on windows

Building svgadrm module on window platform is not required.

Reviewed-by: Charmaine Lee <charmainel@vmware.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7806>

src/gallium/drivers/svga/meson.build

@@ -90,7 +90,12 @@ libsvga = static_library(
   dependencies : idep_mesautil,
 )
 
+svga_deps = [libsvga]
+if not with_platform_windows
+  svga_deps += libsvgadrm
+endif
+
 driver_svga = declare_dependency(
   compile_args : '-DGALLIUM_VMWGFX',
-  link_with : [libsvga, libsvgadrm],
+  link_with : svga_deps,
 )

src/gallium/meson.build

@@ -137,7 +137,9 @@ else
   driver_i915 = declare_dependency()
 endif
 if with_gallium_svga
-  subdir('winsys/svga/drm')
+  if not with_platform_windows
+     subdir('winsys/svga/drm')
+  endif
   subdir('drivers/svga')
 else
   driver_svga = declare_dependency()