[Platform/devel-riscv-v2 PATCHv5-2] edk2-platforms: Update Readme.md for RISC-V platform.

[Platform/devel-riscv-v2 PATCHv5-2] edk2-platforms: Update Readme.md for RISC-V platform.

[Abner Chang]

Update Readme.md, remove the sentence regards with the dependence with
specific commit of riscv-gnu-toolchain. The issue is fixed using compiler
option.

Signed-off-by: Abner Chang <abner.chang@hpe.com>

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Gilbert Chen <gilbert.chen@hpe.com>
Cc: Palmer Dabbelt <palmer@sifive.com>
---
 Readme.md | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/Readme.md b/Readme.md
index 64f2a29..a8c402a 100644
--- a/Readme.md
+++ b/Readme.md
@@ -66,8 +66,7 @@ provide their own packaged cross-toolchains.
 ### GCC for RISC-V
 RISC-V open source community provides GCC toolchains for
 [riscv64-unknown-elf](https://github.com/riscv/riscv-gnu-toolchain)
-compiled to run on x86 Linux. The commit ID 64879b24 is verified to build RISC-V EDK2 platform and boot to EFI
-SHELL successfully.
+compiled to run on x86 Linux.
 
 ### clang
 Clang does not require separate cross compilers, but it does need a
-- 
2.7.4