docs: Add OpenSBI logo and use it in the top-level README.md

We do have an official OpenSBI logo which was designed few months ago
and was also approved by RISC-V International. Lets add this logo
under docs and also use it in the top-level README.md

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>

3 files changed, 2 insertions, 0 deletions

diff --git a/README.md b/README.md
index a6bcb0c1..bb09fdfe 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 RISC-V Open Source Supervisor Binary Interface (OpenSBI)
 ========================================================
 
+![RISC-V OpenSBI](docs/riscv_opensbi_logo_final_color.png)
+
 Copyright and License
 ---------------------
 
diff --git a/docs/riscv_opensbi_logo_final_color.png b/docs/riscv_opensbi_logo_final_color.png
new file mode 100644
index 00000000..11147811
--- /dev/null
+++ b/docs/riscv_opensbi_logo_final_color.png
diff --git a/docs/riscv_opensbi_logo_final_grey.png b/docs/riscv_opensbi_logo_final_grey.png
new file mode 100644
index 00000000..a370f411
--- /dev/null
+++ b/docs/riscv_opensbi_logo_final_grey.png