arm: remove prototype for get_timer_masked

The interruption support had be removed for ARM architecture and
the function get_timer_masked() is no more used except in some
the timer.c files.

This patch clean each timer.c which implement this function and
remove the associated prototype in u-boot-arm.h

For timer.c, I don't verify if the weak version of get_timer
(in lib/time.c) can be used

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/arch/arm/cpu/arm926ejs/armada100/timer.c b/arch/arm/cpu/arm926ejs/armada100/timer.c
index f10f678..d2ecbd0 100644
--- a/arch/arm/cpu/arm926ejs/armada100/timer.c
+++ b/arch/arm/cpu/arm926ejs/armada100/timer.c
@@ -61,7 +61,7 @@
 	return(readl(&armd1timers->cvwr));
 }
 
-ulong get_timer_masked(void)
+static ulong get_timer_masked(void)
 {
 	ulong now = read_timer();
 
diff --git a/arch/arm/cpu/arm926ejs/mx27/timer.c b/arch/arm/cpu/arm926ejs/mx27/timer.c
index 9399320..94b5d45 100644
--- a/arch/arm/cpu/arm926ejs/mx27/timer.c
+++ b/arch/arm/cpu/arm926ejs/mx27/timer.c
@@ -126,7 +126,7 @@
 	return timestamp;
 }
 
-ulong get_timer_masked(void)
+static ulong get_timer_masked(void)
 {
 	/*
 	 * get_ticks() returns a long long (64 bit), it wraps in
diff --git a/arch/arm/cpu/arm926ejs/mxs/timer.c b/arch/arm/cpu/arm926ejs/mxs/timer.c
index 517cadb..7492ba4 100644
--- a/arch/arm/cpu/arm926ejs/mxs/timer.c
+++ b/arch/arm/cpu/arm926ejs/mxs/timer.c
@@ -110,14 +110,9 @@
 	return timestamp;
 }
 
-ulong get_timer_masked(void)
-{
-	return tick_to_time(get_ticks());
-}
-
 ulong get_timer(ulong base)
 {
-	return get_timer_masked() - base;
+	return tick_to_time(get_ticks()) - base;
 }
 
 /* We use the HW_DIGCTL_MICROSECONDS register for sub-millisecond timer. */
diff --git a/arch/arm/cpu/arm926ejs/spear/timer.c b/arch/arm/cpu/arm926ejs/spear/timer.c
index a6637c0..e7b5bda 100644
--- a/arch/arm/cpu/arm926ejs/spear/timer.c
+++ b/arch/arm/cpu/arm926ejs/spear/timer.c
@@ -21,6 +21,8 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+static ulong get_timer_masked(void);
+
 #define timestamp gd->arch.tbl
 #define lastdec gd->arch.lastinc
 
@@ -82,7 +84,7 @@
 		;
 }
 
-ulong get_timer_masked(void)
+static ulong get_timer_masked(void)
 {
 	ulong now = READ_TIMER();