BL2U: Fix ARM platform timer initilization

This issue was detected when testing FWU on Juno. The Timer
`timer_ops` was not being initialized before being used by
the SDS driver on Juno. This patch adds the call to
`generic_delay_timer_init()` during bl2u_early_platform_setup().
This is done generically for all ARM platforms because the
cost involved is minimal.

Change-Id: I349cf0bd1db68406eb2298b65f9c729f792cabdc
Signed-off-by: Soby Mathew <soby.mathew@arm.com>

plat/arm/common/arm_bl2u_setup.c

@@ -8,6 +8,7 @@
 #include <arm_def.h>
 #include <bl_common.h>
 #include <console.h>
+#include <generic_delay_timer.h>
 #include <plat_arm.h>
 #include <platform_def.h>
 #include <platform.h>
@@ -37,6 +38,7 @@ void arm_bl2u_early_platform_setup(meminfo_t *mem_layout, void *plat_info)
 	/* Initialize the console to provide early debug support */
 	console_init(PLAT_ARM_BOOT_UART_BASE, PLAT_ARM_BOOT_UART_CLK_IN_HZ,
 			ARM_CONSOLE_BAUDRATE);
+	generic_delay_timer_init();
 }
 
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