kernel: 5.4 fix build on darwin

kernel: 5.4 fix build on darwin

Fix typedef clash on darwin.

HOSTCC  scripts/mod/file2alias.o
scripts/mod/file2alias.c:47:3: error: typedef redefinition with different types ('struct uuid_t' vs '__darwin_uuid_t' (aka 'unsigned char [16]'))
} uuid_t;
  ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types/_uuid_t.h:31:25: note: previous definition is here
typedef __darwin_uuid_t uuid_t;
                        ^
scripts/mod/file2alias.c:1305:42: error: array initializer must be an initializer list or string literal
        DEF_FIELD(symval, tee_client_device_id, uuid);
                                                ^
2 errors generated.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>