x86: generic: config-6.6: add/remove default syms

Add new default and remove deprecated symbol introduced by 6.6.30[1]

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/diff/arch/x86/Kconfig?id=v6.6.30&id2=v6.6.29

Signed-off-by: John Audia <therealgraysky@proton.me>

target/linux/x86/config-6.6

@@ -61,6 +61,7 @@ CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
 CONFIG_CPU_FREQ_STAT=y
 CONFIG_CPU_IDLE=y
 CONFIG_CPU_IDLE_GOV_LADDER=y
+CONFIG_CPU_MITIGATIONS=y
 CONFIG_CPU_SUP_AMD=y
 CONFIG_CPU_SUP_CENTAUR=y
 CONFIG_CPU_SUP_CYRIX_32=y
@@ -361,7 +362,6 @@ CONFIG_SG_POOL=y
 CONFIG_SOFTIRQ_ON_OWN_STACK=y
 CONFIG_SPARSEMEM_STATIC=y
 CONFIG_SPARSE_IRQ=y
-CONFIG_SPECULATION_MITIGATIONS=y
 CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU=y
 # CONFIG_STATIC_CALL_SELFTEST is not set
 # CONFIG_STRICT_SIGALTSTACK_SIZE is not set