cpu/x86: Drop !CPU_INFO_V2 code

Now that all platforms use parallel_mp this is the only codepath used
for cpu_info() local thread storage.

Change-Id: I119214e703aea8a4fe93f83b784159cf86d859d3
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69122
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/Kconfig b/src/Kconfig
index b33ea62..08b2437 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -715,7 +715,7 @@
 config COOP_MULTITASKING
 	def_bool n
 	select TIMER_QUEUE
-	depends on ARCH_X86 && CPU_INFO_V2
+	depends on ARCH_X86
 	help
 	  Cooperative multitasking allows callbacks to be multiplexed on the
 	  main thread. With this enabled it allows for multiple execution paths