Fix header file test

Signed-off-by: Alastair D'Silva <alastair@d-silva.org>

Author: deece

Makefile

@@ -18,7 +18,7 @@ HAS_WGET = $(shell /bin/which wget > /dev/null 2>&1 && echo y || echo n)
 HAS_CURL = $(shell /bin/which curl > /dev/null 2>&1 && echo y || echo n)
 
 # Update this to test a single feature from the most recent header we require:
-CHECK_OCXL_HEADER_IS_UP_TO_DATE = $(shell /bin/echo -e \\\#include $(1)\\\nvoid test\(struct ocxl_ioctl_platform test\)\; | \
+CHECK_OCXL_HEADER_IS_UP_TO_DATE = $(shell /bin/echo -e \\\#include $(1)\\\nvoid test\(struct ocxl_ioctl_features test\)\; | \
 	$(CC) $(CFLAGS) -Werror -x c -S -o /dev/null - > /dev/null 2>&1 && echo y || echo n)
 
 check_ocxl_header: