fix(intel): fix sp_timer0 is not disabled in firewall on Agilex

sp_timer0 is not disabled in firewall on Agilex causing Zephyr is facing
issue to access the timer.

Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
Change-Id: I0099e200d6c9ca435f46393c6ed9cbe387870af0
diff --git a/plat/intel/soc/common/soc/socfpga_firewall.c b/plat/intel/soc/common/soc/socfpga_firewall.c
index 515784b..fc3889c 100644
--- a/plat/intel/soc/common/soc/socfpga_firewall.c
+++ b/plat/intel/soc/common/soc/socfpga_firewall.c
@@ -60,6 +60,7 @@
 	mmio_write_32(SOCFPGA_L4_PER_SCR(I2C3), DISABLE_L4_FIREWALL);
 	mmio_write_32(SOCFPGA_L4_PER_SCR(I2C4), DISABLE_L4_FIREWALL);
 
+	mmio_write_32(SOCFPGA_L4_PER_SCR(SP_TIMER0), DISABLE_L4_FIREWALL);
 	mmio_write_32(SOCFPGA_L4_PER_SCR(SP_TIMER1), DISABLE_L4_FIREWALL);
 
 	mmio_write_32(SOCFPGA_L4_PER_SCR(UART0), DISABLE_L4_FIREWALL);