ARM: OMAP2+: fix build breakage introduced by commit b7754452

Commit b7754452 ("mtd: onenand: omap:
use pdata info instead of cpu_is") broke an OMAP3+4 build and an N800
multi-OMAP2xxx build here:

drivers/built-in.o: In function `omap2_onenand_probe':
drivers/mtd/onenand/omap2.c:742: undefined reference to `omap2_onenand_read_bufferram'
drivers/mtd/onenand/omap2.c:743: undefined reference to `omap2_onenand_write_bufferram'
drivers/mtd/onenand/omap2.c:742: undefined reference to `omap2_onenand_read_bufferram'
drivers/mtd/onenand/omap2.c:743: undefined reference to `omap2_onenand_write_bufferram'

...

drivers/built-in.o: In function `omap2_onenand_probe':
drivers/mtd/onenand/omap2.c:788: undefined reference to `omap3_onenand_read_bufferram'
drivers/mtd/onenand/omap2.c:788: undefined reference to `omap3_onenand_write_bufferram'

Fix by declaring static functions for the missing symbols, rather than
just prototypes.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Afzal Mohammed <afzal@ti.com>
Cc: Tony Lindgren <tony@atomide.com>

drivers/mtd/onenand/omap2.c

@@ -445,13 +445,19 @@ static int omap3_onenand_write_bufferram(struct mtd_info *mtd, int area,
 
 #else
 
-int omap3_onenand_read_bufferram(struct mtd_info *mtd, int area,
+static int omap3_onenand_read_bufferram(struct mtd_info *mtd, int area,
 					unsigned char *buffer, int offset,
-				 size_t count);
+					size_t count)
+{
+	return -ENOSYS;
+}
 
-int omap3_onenand_write_bufferram(struct mtd_info *mtd, int area,
+static int omap3_onenand_write_bufferram(struct mtd_info *mtd, int area,
 					 const unsigned char *buffer,
-				  int offset, size_t count);
+					 int offset, size_t count)
+{
+	return -ENOSYS;
+}
 
 #endif
 
@@ -549,13 +555,19 @@ static int omap2_onenand_write_bufferram(struct mtd_info *mtd, int area,
 
 #else
 
-int omap2_onenand_read_bufferram(struct mtd_info *mtd, int area,
+static int omap2_onenand_read_bufferram(struct mtd_info *mtd, int area,
 					unsigned char *buffer, int offset,
-				 size_t count);
+					size_t count)
+{
+	return -ENOSYS;
+}
 
-int omap2_onenand_write_bufferram(struct mtd_info *mtd, int area,
+static int omap2_onenand_write_bufferram(struct mtd_info *mtd, int area,
 					 const unsigned char *buffer,
-				  int offset, size_t count);
+					 int offset, size_t count)
+{
+	return -ENOSYS;
+}
 
 #endif