dm: core: Require users of devres to include the header

At present devres.h is included in all files that include dm.h but few
make use of it. Also this pulls in linux/compat which adds several more
headers. Drop the automatic inclusion and require files to include devres
themselves. This provides a good indication of which files use devres.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Anatolij Gustschin <agust@denx.de>

drivers/i2c/ast_i2c.c

@@ -13,6 +13,7 @@
 #include <i2c.h>
 #include <asm/io.h>
 #include <asm/arch/scu_ast2500.h>
+#include <linux/err.h>
 
 #include "ast_i2c.h"
 

drivers/i2c/designware_i2c.c

@@ -12,6 +12,7 @@
 #include <reset.h>
 #include <asm/io.h>
 #include "designware_i2c.h"
+#include <linux/err.h>
 
 #ifdef CONFIG_SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED
 static int  dw_i2c_enable(struct i2c_regs *i2c_base, bool enable)

drivers/i2c/meson_i2c.c

@@ -7,6 +7,7 @@
 #include <clk.h>
 #include <dm.h>
 #include <i2c.h>
+#include <linux/err.h>
 
 #define I2C_TIMEOUT_MS		100
 

drivers/i2c/muxes/i2c-mux-gpio.c

@@ -11,6 +11,7 @@
 #include <asm-generic/gpio.h>
 #include <common.h>
 #include <dm.h>
+#include <dm/devres.h>
 #include <dm/pinctrl.h>
 #include <fdtdec.h>
 #include <i2c.h>

drivers/i2c/tegra_i2c.c

@@ -18,6 +18,7 @@
 #endif
 #include <asm/arch/gpio.h>
 #include <asm/arch-tegra/tegra_i2c.h>
+#include <linux/err.h>
 
 enum i2c_type {
 	TYPE_114,