malta: enable RTC support

This is actually required in order for a Linux kernel to boot
successfully on a physical Malta board. Without enabling the RTC, a
Malta Linux kernel will get stuck in its estimate_frequencies function
on boot.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
diff --git a/board/imgtec/malta/malta.c b/board/imgtec/malta/malta.c
index 119546a..2f92259 100644
--- a/board/imgtec/malta/malta.c
+++ b/board/imgtec/malta/malta.c
@@ -9,6 +9,7 @@
 #include <netdev.h>
 #include <pci_gt64120.h>
 #include <pci_msc01.h>
+#include <rtc.h>
 #include <serial.h>
 
 #include <asm/addrspace.h>
@@ -147,6 +148,13 @@
 	return 0;
 }
 
+int misc_init_r(void)
+{
+	rtc_reset();
+
+	return 0;
+}
+
 struct serial_device *default_serial_console(void)
 {
 	switch (malta_sys_con()) {