beaglev.md: add basic readme

Signed-off-by: Maciej Pijanowski <maciej.pijanowski@3mdeb.com>

beaglev.md

@@ -0,0 +1,36 @@
+BeagleV
+=======
+
+BeagleV is a low-cost RISC-V 64-bit based platform. The beta revision of the
+board uses the Starfive JH7100 SoC.
+
+How to build
+============
+
+```
+$ SHELL=/bin/bash kas-container build ./meta-riscv/beaglev.yml
+```
+
+The `kas-container` script can be obtained from
+[kas repository](https://github.com/siemens/kas/blob/2.4/kas-container).
+
+Build results
+=============
+
+- core-image-minimal-beaglev-starlight-jh7100.wic.gz
+- fw_payload.bin
+- fw_payload.elf
+- extlinux.conf
+- Image
+- starfive_vic7100_beagle_v.dtb
+- u-boot.bin
+
+Flashing
+========
+
+Flash `core-image-minimal-beaglev-starlight-jh7100.wic.gz` onto uSD card.
+
+Testing
+=======
+
+TBD