[U-Boot] Compile error with CONFIG_MULTI_DTB_FIT and not SPL

[Lars Povlsen <lars.povlsen@microsemi.com>]

When changing some MIPS configs from CONFIG_OF_EMBED to
CONFIG_OF_SEPARATE, I ran into this compile issue since SPL is not
enabled. The fix is to guard the <spl.h> header with the
CONFIG_SPL_LIBCOMMON_SUPPORT preprocessor symbol.

It seems that the <spl.h> is not needed even when SPL is enabled, but
I'm not 100% sure on that. The code at lines 55..57 guarded by
CONFIG_SPL_LIBCOMMON_SUPPORT does not require the <spl.h> header file.

Signed-off-by: Lars Povlsen <lars.povlsen@microsemi.com>
---
 common/common_fit.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/common/common_fit.c b/common/common_fit.c
index 577b352..33e26cc 100644
--- a/common/common_fit.c
+++ b/common/common_fit.c
@@ -8,7 +8,9 @@
 #include <errno.h>
 #include <image.h>
 #include <linux/libfdt.h>
+#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 #include <spl.h>
+#endif
 
 ulong fdt_getprop_u32(const void *fdt, int node, const char *prop)
 {
-- 
2.7.4