smbios: smbios.h should not import ofnode.h

The smbios.h include does not use any definitions from ofnode.h.
So don't include it.

As DECLARE_GLOBAL_DATA_PTR is no longer defined via dm/of.h we need to
add it to efi_smbios.c.

Add now missing includes to smbios-parser.c.

Remove a superfluous check comparing the sizes of the SMBIOS 2.1 and SMBIOS
3.0 anchors.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

lib/smbios-parser.c

@@ -5,8 +5,11 @@
 
 #define LOG_CATEGORY	LOGC_BOOT
 
+#include <errno.h>
 #include <smbios.h>
+#include <string.h>
 #include <tables_csum.h>
+#include <linux/kernel.h>
 
 const struct smbios_entry *smbios_entry(u64 address, u32 size)
 {