[PATCH v2] imx-bbu-nand-fcb: fix build on MX28 only

[Lucas Stach]

This code may be compiled without ARCH_IMX6 present, so it must not
depend on any functions provided by the architecture support.

Fixes: a2618c215bff (imx-bbu-nand-fcb: add support for imx6ul)
Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
v2: Remove ifdeffery by introducing a dedicated function, as
    suggested by Sascha.
---
 common/imx-bbu-nand-fcb.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/common/imx-bbu-nand-fcb.c b/common/imx-bbu-nand-fcb.c
index 89b404884ae8..2c8ca979266c 100644
--- a/common/imx-bbu-nand-fcb.c
+++ b/common/imx-bbu-nand-fcb.c
@@ -38,9 +38,21 @@
 #include <io.h>
 #include <crc.h>
 #include <mach/generic.h>
-#include <mach/imx6.h>
 #include <mtd/mtd-peb.h>
 
+#ifdef CONFIG_ARCH_IMX6
+#include <mach/imx6.h>
+static inline int fcb_is_bch_encoded(void)
+{
+       return cpu_is_mx6ul() || cpu_is_mx6ull();
+}
+#else
+static inline int fcb_is_bch_encoded(void)
+{
+       return 0;
+}
+#endif
+
 struct dbbt_block {
 	uint32_t Checksum;
 	uint32_t FingerPrint;
@@ -441,7 +453,7 @@ static int read_fcb(struct mtd_info *mtd, int num, struct fcb_block **retfcb)
 		goto err;
 	}
 
-	if (cpu_is_mx6ul() || cpu_is_mx6ull())
+	if (fcb_is_bch_encoded())
 		fcb = read_fcb_bch(rawpage, 40);
 	else
 		fcb = read_fcb_hamming_13_8(rawpage);
@@ -899,7 +911,7 @@ static int imx_bbu_write_fcbs_dbbts(struct mtd_info *mtd, struct fcb_block *fcb)
 
 	fcb_raw_page = xzalloc(mtd->writesize + mtd->oobsize);
 
-	if (cpu_is_mx6ul() || cpu_is_mx6ull()) {
+	if (fcb_is_bch_encoded()) {
 		/* 40 bit BCH, for i.MX6UL(L) */
 		encode_bch_ecc(fcb_raw_page + 32, fcb, 40);
 	} else {
-- 
2.11.0