SPEAr3xx: Replace printk() with pr_*()

For better print logs/messages, it is advisable to use pr_*() routines instead
of directly calling printks. This patch removes direct calling of printks for
spear3xx.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>

arch/arm/mach-spear3xx/spear3xx.c

@@ -11,6 +11,8 @@
  * warranty of any kind, whether express or implied.
  */
 
+#define pr_fmt(fmt) "SPEAr3xx: " fmt
+
 #include <linux/types.h>
 #include <linux/amba/pl061.h>
 #include <linux/ptrace.h>