aarch64: Stop using asm/hwcap.h for the HWCAP_* detection

Including sys/auxv.h should be enough (it pulls in bits/hwcap.h,
which provides the same defines).

Signed-off-by: Martin Storsjö <martin@martin.st>

configure

@@ -2202,7 +2202,6 @@ HAVE_LIST_PUB="
 
 HEADERS_LIST="
     arpa_inet_h
-    asm_hwcap_h
     asm_types_h
     cdio_paranoia_h
     cdio_paranoia_paranoia_h
@@ -6453,7 +6452,6 @@ check_headers io.h
 enabled libdrm &&
     check_headers linux/dma-buf.h
 
-check_headers asm/hwcap.h
 check_headers linux/perf_event.h
 check_headers libcrystalhd/libcrystalhd_if.h
 check_headers malloc.h

libavutil/aarch64/cpu.c

@@ -20,9 +20,8 @@
 #include "libavutil/cpu_internal.h"
 #include "config.h"
 
-#if (defined(__linux__) || defined(__ANDROID__)) && HAVE_GETAUXVAL && HAVE_ASM_HWCAP_H
+#if (defined(__linux__) || defined(__ANDROID__)) && HAVE_GETAUXVAL
 #include <stdint.h>
-#include <asm/hwcap.h>
 #include <sys/auxv.h>
 
 #define get_cpu_feature_reg(reg, val) \