Config.in.legacy: fix removed bootlin riscv64 toolchains

commit b3c66481e1f1503fcbf193d0c780271e880ad500 replaced RISC-V LP64
bootlin toolchains by RISC-V LP64D. However, Config.in.legacy was added
for BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_RISCV64_GLIBC_STABLE, which never
existed (the stable version was only added after the switch to LP64D).
Conversely, BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_RISCV64_MUSL_BLEEDING_EDGE,
which was removed, was not mentioned in Config.in.legacy.

Correct the symbol name and its comment in Config.in.legacy.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

Config.in.legacy

@@ -153,8 +153,8 @@ config BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_RISCV64_GLIBC_BLEEDING_EDGE
 	  The RISC-V 64-bit LP64 Bootlin toolchains have been removed,
 	  in favor of RISC-V 64-bit LP64D toolchains.
 
-config BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_RISCV64_GLIBC_STABLE
-	bool "Bootlin riscv64 glibc bleeding-edge toolchain removed"
+config BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_RISCV64_MUSL_BLEEDING_EDGE
+	bool "Bootlin riscv64 musl bleeding-edge toolchain removed"
 	select BR2_LEGACY
 	help
 	  The RISC-V 64-bit LP64 Bootlin toolchains have been removed,