Blackfin arch: Need to specify ax with the .init.text section,

Need to specify "ax" with the .init.text section, otherwise the linker will
make unique .init.text.1 .. .init.text.3 sections to cope with the flags

arch/blackfin/mach-common/entry.S

@@ -881,7 +881,7 @@ ENTRY(_software_trace_buff)
 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND */
 
 #if CONFIG_EARLY_PRINTK
-.section .init.text
+.section .init.text,"ax"
 ENTRY(_early_trap)
 	SAVE_ALL_SYS
 	trace_buffer_stop(p0,r0);