u_format: Assert that array formats don't include BE swizzles.

Z32_FLOAT_S8X24_UINT and X32_S8X24_UINT are in fact the only non-bitmask
formats that have BE swizzles specified, but sorting out those two is
harder.

Acked-by: Adam Jackson <ajax@redhat.com>
Acked-by: Ilia Mirkin <imirkin@alum.mit.edu>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10505>

src/util/format/u_format_parse.py

@@ -129,6 +129,10 @@ class Format:
             le_shift += channel.size
 
         if be_channels:
+            if self.is_array():
+                print(
+                    "{} is an array format and should not include BE swizzles in the CSV".format(self.name))
+                exit(1)
             self.be_channels = be_channels
             self.be_swizzles = be_swizzles
         else: