doc: board: ti: Use prompt prompt_style to simplify documentation

The sphinx-prompt documentation[0] provides examples on how we can use
prompt as a parameter to simplify the description. Use the same.

While at it, ensure to make all relevant prompts clarified such as gdb
prompts.

[0] http://sbrunner.github.io/sphinx-prompt/

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/doc/board/ti/ks2_evm.rst b/doc/board/ti/ks2_evm.rst
index 5e3ecad..16c2e57 100644
--- a/doc/board/ti/ks2_evm.rst
+++ b/doc/board/ti/ks2_evm.rst
@@ -122,8 +122,7 @@
 
 To build u-boot.bin, u-boot-spi.gph, MLO:
 
-.. prompt:: bash
-   :prompts: $
+.. prompt:: bash $
 
    make k2hk_evm_defconfig
    make
@@ -197,8 +196,7 @@
 4. Free Run the target as described earlier (step 4) to get U-Boot prompt
 5. At the U-Boot console type following to setup U-Boot environment variables.
 
-.. prompt:: bash
-   :prompts: =>
+.. prompt:: bash =>
 
    setenv addr_uboot 0x87000000
    setenv filesize <size in hex of u-boot-spi.gph rounded to hex 0x10000>
@@ -226,8 +224,7 @@
 4. Free Run the target as described earlier (step 4) to get U-Boot prompt
 5. At the U-Boot console type following to setup U-Boot environment variables.
 
-.. prompt:: bash
-   :prompts: =>
+.. prompt:: bash =>
 
    setenv filesize <size in hex of MLO rounded to hex 0x10000>
    run burn_uboot_nand
@@ -249,10 +246,10 @@
 1. On the regular UART port start xmodem transfer of the u-boot.bin
 2. Using BMC terminal set the ARM-UART bootmode and reboot the EVM
 
-.. prompt:: bash
+.. prompt:: bash BMC>
 
-   BMC> bootmode #4
-   MBC> reboot
+  bootmode #4
+  reboot
 
 3. When xmodem is complete you should see the U-Boot starts on the UART port