powerpc/asm: Move function declaration of 'serdes_get_prtcl' to fsl_serdes.h

It allows files not in the same path to use this function
as required by B4 board file

Signed-off-by: Shaveta Leekha <shaveta@freescale.com>
diff --git a/arch/powerpc/cpu/mpc85xx/fsl_corenet2_serdes.h b/arch/powerpc/cpu/mpc85xx/fsl_corenet2_serdes.h
index 6de572d..d515b23 100644
--- a/arch/powerpc/cpu/mpc85xx/fsl_corenet2_serdes.h
+++ b/arch/powerpc/cpu/mpc85xx/fsl_corenet2_serdes.h
@@ -9,5 +9,4 @@
 
 int is_serdes_prtcl_valid(int serdes, u32 prtcl);
 int serdes_lane_enabled(int lane);
-enum srds_prtcl serdes_get_prtcl(int serdes, int cfg, int lane);
 #endif /* __FSL_CORENET2_SERDES_H */
diff --git a/arch/powerpc/include/asm/fsl_serdes.h b/arch/powerpc/include/asm/fsl_serdes.h
index 59189ad..1106d28 100644
--- a/arch/powerpc/include/asm/fsl_serdes.h
+++ b/arch/powerpc/include/asm/fsl_serdes.h
@@ -90,6 +90,7 @@
 #ifdef CONFIG_FSL_CORENET
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 int serdes_get_first_lane(u32 sd, enum srds_prtcl device);
+enum srds_prtcl serdes_get_prtcl(int serdes, int cfg, int lane);
 #else
 int serdes_get_first_lane(enum srds_prtcl device);
 #endif