i386: import & use bootparam.h

it's from v4.20-rc5.

CC: Stefano Garzarella <sgarzare@redhat.com>
CC: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/scripts/update-linux-headers.sh b/scripts/update-linux-headers.sh
index 0a964fe..3578cfe 100755
--- a/scripts/update-linux-headers.sh
+++ b/scripts/update-linux-headers.sh
@@ -120,6 +120,12 @@
         cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
         cp_portable "$tmpdir/include/asm/kvm_para.h" "$output/include/standard-headers/asm-$arch"
+        # Remove everything except the macros from bootparam.h avoiding the
+        # unnecessary import of several video/ist/etc headers
+        sed -e '/__ASSEMBLY__/,/__ASSEMBLY__/d' \
+               "$tmpdir/include/asm/bootparam.h" > "$tmpdir/bootparam.h"
+        cp_portable "$tmpdir/bootparam.h" \
+                    "$output/include/standard-headers/asm-$arch"
     fi
 done