arm: Move uart_clk to arch_global_data

Move this field into arch_global_data and tidy up.
Signed-off-by: NSimon Glass <sjg@chromium.org>

arch/powerpc/cpu/ppc4xx/4xx_uart.c

@@ -296,10 +296,10 @@ int get_serial_clock(void)
 	 * the UART divisor is available
 	 */
 #ifdef CONFIG_SYS_EXT_SERIAL_CLOCK
-	gd->uart_clk = CONFIG_SYS_EXT_SERIAL_CLOCK;
+	gd->arch.uart_clk = CONFIG_SYS_EXT_SERIAL_CLOCK;
 #else
 	get_sys_info(&sys_info);
-	gd->uart_clk = sys_info.freqUART / udiv;
+	gd->arch.uart_clk = sys_info.freqUART / udiv;
 #endif
 
 	return clk;

arch/powerpc/cpu/ppc4xx/fdt.c

@@ -141,7 +141,7 @@ void ft_cpu_setup(void *blob, bd_t *bd)
 
 	/*
 	 * Fixup all UART clocks for CPU internal UARTs
-	 * (only these UARTs are definitely clocked by gd->uart_clk)
+	 * (only these UARTs are definitely clocked by gd->arch.uart_clk)
 	 *
 	 * These UARTs are direct childs of /plb/opb. This code
 	 * does not touch any UARTs that are connected to the ebc.
@@ -160,7 +160,7 @@ void ft_cpu_setup(void *blob, bd_t *bd)
 		    (fdt_node_check_compatible(blob, off, "ns16550") == 0))
 			fdt_setprop(blob, off,
 				    "clock-frequency",
-				    (void*)&(gd->uart_clk), 4);
+				    (void *)&gd->arch.uart_clk, 4);
 	}
 
 	/*

arch/powerpc/include/asm/global_data.h

@@ -116,6 +116,9 @@ struct arch_global_data {
 	unsigned int dp_alloc_base;
 	unsigned int dp_alloc_top;
 #endif
+#if defined(CONFIG_4xx)
+	u32 uart_clk;
+#endif /* CONFIG_4xx */
 };
 
 /*
@@ -145,9 +148,6 @@ typedef	struct	global_data {
 #ifdef CONFIG_PRE_CONSOLE_BUFFER
 	unsigned long	precon_buf_idx;	/* Pre-Console buffer index */
 #endif
-#if defined(CONFIG_4xx)
-	u32  uart_clk;
-#endif /* CONFIG_4xx */
 #if defined(CONFIG_SYS_GT_6426x)
 	unsigned int	mirror_hack[16];
 #endif