[PATCH for-5.2] hw/display/tcx: add missing 64-bit access for framebuffer blitter

[Mark Cave-Ayland]

Commit ae5643ecc6 "hw/display/tcx: Allow 64-bit accesses to framebuffer stippler
and blitter" enabled 64-bit access for the TCX framebuffer stippler and blitter
but missed applying the change to one of the blitter MemoryRegions.

Whilst the original change works for me on my local NetBSD test image, the 
latest
NetBSD ISO panics on startup without this fix.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Fixes: ae5643ecc6 ("hw/display/tcx: Allow 64-bit accesses to framebuffer 
stippler and blitter")
Buglink: https://bugs.launchpad.net/bugs/1892540
---
 hw/display/tcx.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/display/tcx.c b/hw/display/tcx.c
index 878ecc8c50..3799d29b75 100644
--- a/hw/display/tcx.c
+++ b/hw/display/tcx.c
@@ -649,10 +649,14 @@ static const MemoryRegionOps tcx_blit_ops = {
     .read = tcx_blit_readl,
     .write = tcx_blit_writel,
     .endianness = DEVICE_NATIVE_ENDIAN,
-    .valid = {
+    .impl = {
         .min_access_size = 4,
         .max_access_size = 4,
     },
+    .valid = {
+        .min_access_size = 4,
+        .max_access_size = 8,
+    },
 };
 
 static const MemoryRegionOps tcx_rblit_ops = {
-- 
2.20.1