tools/libxenguest: fix build in stubdom environment

With introduction of the new byteswap infrastructure the build of
libxenguest for stubdoms was broken. Fix that again.

Fixes: 60dcff871e ("xen/decompressors: Remove use of *_to_cpup() helpers")
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jason Andryuk <jason.andryuk@amd.com>
Acked-by: Anthony PERARD <anthony.perard@vates.tech>

tools/libs/guest/xg_dom_decompress_unsafe_lzo1x.c

@@ -25,6 +25,15 @@ static inline uint16_t be16_to_cpu(const uint16_t v)
 #endif
 }
 
+static inline uint32_t be32_to_cpu(const uint32_t v)
+{
+#if BYTE_ORDER == LITTLE_ENDIAN
+	return __builtin_bswap32(v);
+#else
+	return v;
+#endif
+}
+
 #include "../../xen/common/lzo.c"
 #include "../../xen/common/unlzo.c"
 

tools/libs/guest/xg_dom_decompress_unsafe_xz.c

@@ -25,7 +25,7 @@ static inline uint32_t cpu_to_le32(const uint32_t v)
 #endif
 }
 
-static inline uint32_t le32_to_cpu(const uint32_t p)
+static inline uint32_t le32_to_cpu(const uint32_t v)
 {
 #if BYTE_ORDER == BIG_ENDIAN
 	return __builtin_bswap32(v);