riscv: Kconfig.errata: Add dependency for RISCV_SBI in ERRATA_ANDES config

Andes errata uses sbi_ecalll() which is only available if RISCV_SBI is
enabled. So add an dependency for RISCV_SBI in ERRATA_ANDES config to
avoid any build failures.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308311610.ec6bm2G8-lkp@intel.com/Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20230901110320.312674-1-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Palmer Dabbelt <palmer@rivosinc.com>

arch/riscv/Kconfig.errata

@@ -2,7 +2,7 @@ menu "CPU errata selection"
 
 config ERRATA_ANDES
 	bool "Andes AX45MP errata"
-	depends on RISCV_ALTERNATIVE
+	depends on RISCV_ALTERNATIVE && RISCV_SBI
 	help
 	  All Andes errata Kconfig depend on this Kconfig. Disabling
 	  this Kconfig will disable all Andes errata. Please say "Y"