package/sunxi-mali: remove sunxi-mali libMali for r2p4 Mali kernel modules

package/sunxi-mali: remove sunxi-mali libMali for r2p4 Mali kernel modules

sunxi-mali userspace drivers (libMali.so) for r2p4 Mali kernel modules
are linked against libUMP.so.2 but libump package in Buildroot only
provide libUMP.so.3.

In upstream commit 1c5063f43cdc9de341c0d63b2e3921cab86c7742 [1], library
versioning was added. For the r3p* libraries, libUMP.so.3 is used (and
provided by Buildroot libump package), but for the r2p* libraries,
libUMP.so.2 is used (and not provided by Buildroot libump package).

Due to this any program or library trying to link with -lGLESv2 or -lEGL
will fail with the following error:

arm-none-linux-gnueabi/bin/ld: warning: libUMP.so.2, needed by output/host/usr/arm-buildroot-linux-gnueabi/sysroot/armv4t/usr/lib/libMali.so, not found (try using -rpath or -rpath-link)

output/host/usr/arm-buildroot-linux-gnueabi/sysroot/armv4t/usr/lib/libEGL.so: undefined reference to `ump_close'
output/host/usr/arm-buildroot-linux-gnueabi/sysroot/armv4t/usr/lib/libEGL.so: undefined reference to `ump_mapped_pointer_get'
output/host/usr/arm-buildroot-linux-gnueabi/sysroot/armv4t/usr/lib/libEGL.so: undefined reference to `ump_secure_id_get'
output/host/usr/arm-buildroot-linux-gnueabi/sysroot/armv4t/usr/lib/libEGL.so: undefined reference to `ump_mapped_pointer_release'
output/host/usr/arm-buildroot-linux-gnueabi/sysroot/armv4t/usr/lib/libMali.so: undefined reference to `ump_reference_add'
output/host/usr/arm-buildroot-linux-gnueabi/sysroot/armv4t/usr/lib/libMali.so: undefined reference to `ump_size_get'
output/host/usr/arm-buildroot-linux-gnueabi/sysroot/armv4t/usr/lib/libEGL.so: undefined reference to `ump_reference_release'
output/host/usr/arm-buildroot-linux-gnueabi/sysroot/armv4t/usr/lib/libEGL.so: undefined reference to `ump_open'
collect2: error: ld returned 1 exit status

Since nothing provides libUMP.so.2, this commit removes the
BR2_PACKAGE_SUNXI_MALI_R2P4 option and adds the BR2_ARM_EABIHF
dependency directly to sunxi-mali package.

Fixes:

  http://autobuild.buildroot.net/results/8d0/8d0b78798abf0c4ca124952d0d0455da6f8fa14f/

[1] https://github.com/linux-sunxi/sunxi-mali-proprietary/commit/1c5063f43cdc9de341c0d63b2e3921cab86c7742
[2] http://lists.busybox.net/pipermail/buildroot/2017-February/183500.html

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Francois Perrad <francois.perrad@gadz.org>
[Thomas: fix conflicts when applying on master, tweak commit log.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>