Consolidate of_find_property

The only change here is that a readlock is taken while the property list
is being traversed on Sparc where it was not taken previously.

Also, Sparc uses strcasecmp to compare property names while PowerPC
uses strcmp.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Acked-by: David S. Miller <davem@davemloft.net>

include/asm-powerpc/prom.h

@@ -25,6 +25,7 @@
 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT	1
 
 #define of_compat_cmp(s1, s2, l)	strncasecmp((s1), (s2), (l))
+#define of_prop_cmp(s1, s2)		strcmp((s1), (s2))
 
 /* Definitions used by the flattened device tree */
 #define OF_DT_HEADER		0xd00dfeed	/* marker */

include/asm-sparc/prom.h

@@ -24,6 +24,7 @@
 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT	1
 
 #define of_compat_cmp(s1, s2, l)	strncmp((s1), (s2), (l))
+#define of_prop_cmp(s1, s2)		strcasecmp((s1), (s2))
 
 typedef u32 phandle;
 typedef u32 ihandle;

include/asm-sparc64/prom.h

@@ -24,6 +24,7 @@
 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT	1
 
 #define of_compat_cmp(s1, s2, l)	strncmp((s1), (s2), (l))
+#define of_prop_cmp(s1, s2)		strcasecmp((s1), (s2))
 
 typedef u32 phandle;
 typedef u32 ihandle;