firmware: rockchip: use sp_el1 from bl31 delivers

we think 'if (fiq_pt_regs.pstate & 0x10)' doesn't make any
sense, use sp_el1 from bl31 delivers is ok.

Change-Id: I0792d76e39912b4ca5484b029761daac05cd719b
Signed-off-by: chenjh <chenjh@rock-chips.com>

drivers/firmware/rockchip_sip.c

@@ -144,13 +144,7 @@ static struct pt_regs sip_fiq_debugger_get_pt_regs(void *reg_base,
 
 	/* copy pstate */
 	memcpy(&fiq_pt_regs.pstate, reg_base + 0x110, 8);
-
-	/* EL1 mode */
-	if (fiq_pt_regs.pstate & 0x10)
-		memcpy(&fiq_pt_regs.sp, reg_base + 0xf8, 8);
-	/* EL0 mode */
-	else
-		fiq_pt_regs.sp = sp_el1;
+	fiq_pt_regs.sp = sp_el1;
 
 	/* copy pc */
 	memcpy(&fiq_pt_regs.pc, reg_base + 0x118, 8);