opensbi: Use -ffreestanding compiler options

This usually helps compiler to not use built-in optimizations
for string functions and mem* functions unnecessarily, since OE's
compiler is hosted for linux cross compile, this also means we instruct
it rightly for building a baremetal application

Refresh the patches to apply without fuzz
Fixes linking errors e.g.

platform/qemu/virt/lib/libplatsbi.a(sbi_string.o): in function `sbi_memset':
| /mnt/b/yoe/build/tmp/work/riscv64-yoe-linux/opensbi/0.5-r0/git/lib/sbi/sbi_string.c:102: undefined reference to `memset'
| collect2: error: ld returned 1 exit status

(From OE-Core rev: f599b6c77f3585c8917f4d685689da4cc8a8bf04)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/recipes-bsp/opensbi/opensbi_0.5.bb b/meta/recipes-bsp/opensbi/opensbi_0.5.bb
index 759bbbfdaa..6a9026254c 100644
--- a/meta/recipes-bsp/opensbi/opensbi_0.5.bb
+++ b/meta/recipes-bsp/opensbi/opensbi_0.5.bb
@@ -11,6 +11,7 @@ inherit autotools-brokensep deploy
 SRCREV = "be92da280d87c38a2e0adc5d3f43bab7b5468f09"
 SRC_URI = "git://github.com/riscv/opensbi.git \
            file://0001-Makefile-Don-t-specify-mabi-or-march.patch \
+           file://0001-build-Use-ffreestanding.patch \
           "
 
 S = "${WORKDIR}/git"