cryptodev-linux: clean up do_install

The upstream Makefile now supports installing the headers directly[1],
so use the target instead of calling install manually.

[1] https://github.com/cryptodev-linux/cryptodev-linux/commit/e3962fea4e1816df420c36ad72845f90dfcfb611

(From OE-Core rev: 749de43ccc13488c0ec74e4a4257cc25cbf89370)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-kernel/cryptodev/cryptodev-linux_1.14.bb

@@ -4,9 +4,8 @@ SUMMARY = "A /dev/crypto device driver header file"
 
 do_compile[noexec] = "1"
 
-# Just install cryptodev.h which is the only header file needed to be exported
 do_install() {
-	install -D ${S}/crypto/cryptodev.h ${D}${includedir}/crypto/cryptodev.h
+	oe_runmake headers_install DESTDIR="${D}"
 }
 
 ALLOW_EMPTY:${PN} = "1"