Currently all assembly optimized implementation of memory routines show up at the top level of the RISC-V architecture Kconfig menu. Let's group them together into a submenu. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>  | 
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| .. | ||
| cpu | ||
| dts | ||
| include/asm | ||
| lib | ||
| Kconfig | ||
| Makefile | ||
| config.mk | ||