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>

target/linux/generic/hack-5.4/211-darwin-uuid-typedef-clash.patch

@@ -0,0 +1,27 @@
+From e44fc2af1ddc452b6659d08c16973d65c73b7d0a Mon Sep 17 00:00:00 2001
+From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
+Date: Wed, 5 Feb 2020 18:36:43 +0000
+Subject: [PATCH] file2alias: build on macos
+
+Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
+---
+ scripts/mod/file2alias.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
+index c91eba751804..e756fd80b721 100644
+--- a/scripts/mod/file2alias.c
++++ b/scripts/mod/file2alias.c
+@@ -38,6 +38,9 @@ typedef struct {
+ 	__u8 b[16];
+ } guid_t;
+ 
++#ifdef __APPLE__
++#define uuid_t compat_uuid_t
++#endif
+ /* backwards compatibility, don't use in new code */
+ typedef struct {
+ 	__u8 b[16];
+-- 
+2.21.1 (Apple Git-122.3)
+