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>
diff --git a/arch/riscv/lib/andes_plic.c b/arch/riscv/lib/andes_plic.c
index 3868569..20529ab 100644
--- a/arch/riscv/lib/andes_plic.c
+++ b/arch/riscv/lib/andes_plic.c
@@ -17,6 +17,7 @@
 #include <asm/io.h>
 #include <asm/syscon.h>
 #include <cpu.h>
+#include <linux/err.h>
 
 /* pending register */
 #define PENDING_REG(base, hart)	((ulong)(base) + 0x1000 + ((hart) / 4) * 4)