Driver core: rename ktype_edd and ktype_efivar

This makes it a bit more sane when trying to figure out how to clean up
the ktype mess.

Based on a larger patch from Kay Sievers

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index bfd2d67..858a7b9 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -402,7 +402,7 @@
 	NULL,
 };
 
-static struct kobj_type ktype_efivar = {
+static struct kobj_type efivar_ktype = {
 	.release = efivar_release,
 	.sysfs_ops = &efivar_attr_ops,
 	.default_attrs = def_attrs,
@@ -583,7 +583,7 @@
 	NULL,	/* maybe more in the future? */
 };
 
-static decl_subsys(vars, &ktype_efivar, NULL);
+static decl_subsys(vars, &efivar_ktype, NULL);
 static decl_subsys(efi, NULL, NULL);
 
 /*