fdt: Export fdtdec_get_number() for general use

This function is missing a prototype but is more widey useful. Add it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

include/fdtdec.h

@@ -388,6 +388,17 @@ int fdtdec_get_pci_bar32(const void *blob, int node,
 s32 fdtdec_get_int(const void *blob, int node, const char *prop_name,
 		s32 default_val);
 
+/**
+ * Get a variable-sized number from a property
+ *
+ * This reads a number from one or more cells.
+ *
+ * @param ptr	Pointer to property
+ * @param cells	Number of cells containing the number
+ * @return the value in the cells
+ */
+u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells);
+
 /**
  * Look up a 64-bit integer property in a node and return it. The property
  * must have at least 8 bytes of data (2 cells). The first two cells are

lib/fdtdec.c

@@ -918,7 +918,7 @@ int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
 	return 0;
 }
 
-static u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
+u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
 {
 	u64 number = 0;