makefiles/modules.inc.mk: remove deprecated FEATURE_PERIPH_ macros

`#ifdef FEATURE_PERIPH_NAME` usage should now be replaced by
`#ifdef MODULE_PERIPH_NAME`.

This deprecation was started by pull requests #8226 and #8227.

makefiles/modules.inc.mk

-ED = $(addprefix FEATURE_,$(sort $(filter $(FEATURES_PROVIDED), $(FEATURES_REQUIRED))))
-ED += $(addprefix MODULE_,$(sort $(USEMODULE) $(USEPKG)))
+ED = $(addprefix MODULE_,$(sort $(USEMODULE) $(USEPKG)))
 EXTDEFINES = $(addprefix -D,$(shell echo '$(ED)' | tr 'a-z-' 'A-Z_'))
 
 # filter "pseudomodules" from "real modules", but not "no_pseudomodules"