spl: bootcount: Move code out of header file

It is not good practice to write code in a header file. If it is included
multiple times then the code can cause duplicate functions.

Move the bootcount_store() and bootcount_load() functions into SPL.

Note: bootcount is a bit strange in that it uses driver model but does not
define proper drivers. This should be fixed.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/common/spl/spl.c b/common/spl/spl.c
index cc5507f..a2ef13a 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -830,3 +830,14 @@
 	return 0;
 #endif
 }
+
+#if defined(CONFIG_BOOTCOUNT_LIMIT) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT)
+void bootcount_store(ulong a)
+{
+}
+
+ulong bootcount_load(void)
+{
+	return 0;
+}
+#endif
diff --git a/include/bootcount.h b/include/bootcount.h
index 8fa8cf8..a26a385 100644
--- a/include/bootcount.h
+++ b/include/bootcount.h
@@ -127,10 +127,6 @@
 #endif /* !CONFIG_SPL_BUILD */
 }
 
-#if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT)
-void bootcount_store(ulong a) {};
-ulong bootcount_load(void) { return 0; }
-#endif /* CONFIG_SPL_BUILD && !CONFIG_SPL_BOOTCOUNT_LIMIT */
 #else
 static inline int bootcount_error(void) { return 0; }
 static inline void bootcount_inc(void) {}