ARC: boot: Non Master cpus only need to call EARLY_CPU_SETUP once

With prev fixes, all cores now start via common entry point @stext which
already calls EARLY_CPU_SETUP for all cores - so no need to invoke it
again

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/kernel/head.S

@@ -120,8 +120,6 @@ END(stext)
 	.section .text, "ax",@progbits
 ENTRY(first_lines_of_secondary)
 
-	CPU_EARLY_SETUP
-
 	; setup per-cpu idle task as "current" on this CPU
 	ld	r0, [@secondary_idle_tsk]
 	SET_CURR_TASK_ON_CPU  r0, r1