rockchip/edid: fix label followed by a declaration

placing a label directly before a declaration is officially supported in C23,
but triggers an error on clang when compiling with older C standards

Bug: #283
Signed-off-by: Pepper Gray <hello@peppergray.xyz>

Author: peppergrayxyz

edk2-rockchip/Silicon/Rockchip/Drivers/LcdGraphicsOutputDxe/Edid.c

@@ -463,6 +463,7 @@ EdidGetPreferredModeDetailed (
     } else {
       switch (Edid[0x00]) {
         case EDID_EXTENSION_CEA_861:
+        {
           UINT8  DtdOffset = Edid[0x02];
           UINT8  DtdEnd    = EDID_BLOCK_SIZE - 1;
 
@@ -473,6 +474,7 @@ EdidGetPreferredModeDetailed (
           DetailedTimings      = (EDID_DETAILED_TIMING *)(Edid + DtdOffset);
           DetailedTimingsCount = (DtdEnd - DtdOffset) / sizeof (EDID_DETAILED_TIMING);
           break;
+        }
         case EDID_EXTENSION_VTB:
           if (Edid[0x01] != 1) {
             continue;