flashrom: Add ARC support

Mainly endian definitions are needed.

Removed sys/io.h patch. It's a GNU header unsupported by uClibc-ng.

Cleaned up Makefile slightly.

Added HTTPS everywhere.

Added PKG_BUILD_PARALLEL for faster compilation.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
(cherry-picked from 12378cd4d3)

utils/flashrom/patches/0003-ch341a_spi-avoid-deprecated-libusb-functions.patch

@@ -21,7 +21,7 @@ diff --git a/ch341a_spi.c b/ch341a_spi.c
 index 95e9c95..ee18624 100644
 --- a/ch341a_spi.c
 +++ b/ch341a_spi.c
-@@ -441,7 +441,12 @@ int ch341a_spi_init(void)
+@@ -444,7 +444,12 @@ int ch341a_spi_init(void)
  		return -1;
  	}