x86: update defconfig for 5.15.57

Add some new/missing symbols relating to speculative execution mitigations[1].

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/diff/arch/x86/Kconfig?id=v5.15.57&id2=v5.15.56

Signed-off-by: John Audia <[email protected]>

target/linux/x86/config-5.15

@@ -53,6 +53,9 @@ CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
 # CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
 # CONFIG_CPU_FREQ_GOV_USERSPACE is not set
 CONFIG_CPU_FREQ_STAT=y
+CONFIG_CPU_IBPB_ENTRY=y
+CONFIG_CPU_IBRS_ENTRY=y
+# CONFIG_SLS is not set
 CONFIG_CPU_IDLE=y
 CONFIG_CPU_IDLE_GOV_LADDER=y
 CONFIG_CPU_SUP_AMD=y
@@ -63,11 +66,13 @@ CONFIG_CPU_SUP_INTEL=y
 CONFIG_CPU_SUP_TRANSMETA_32=y
 CONFIG_CPU_SUP_UMC_32=y
 CONFIG_CPU_SUP_ZHAOXIN=y
+CONFIG_CPU_UNRET_ENTRY=y
 CONFIG_CRASH_CORE=y
 CONFIG_CRC16=y
 CONFIG_CRYPTO_CRC32=y
 CONFIG_CRYPTO_CRC32C=y
 # CONFIG_CRYPTO_CRC32_PCLMUL is not set
+CONFIG_CRYPTO_LIB_BLAKE2S_GENERIC=y
 CONFIG_CRYPTO_LIB_POLY1305_RSIZE=1
 CONFIG_CRYPTO_RNG2=y
 # CONFIG_CRYPTO_SERPENT_SSE2_586 is not set
@@ -82,6 +87,7 @@ CONFIG_DEBUG_MISC=y
 # CONFIG_DEBUG_TLBFLUSH is not set
 CONFIG_DECOMPRESS_BZIP2=y
 CONFIG_DECOMPRESS_GZIP=y
+CONFIG_RETHUNK=y
 CONFIG_DMADEVICES=y
 CONFIG_DMI=y
 CONFIG_DMIID=y
@@ -320,6 +326,7 @@ CONFIG_SG_POOL=y
 # CONFIG_SMSC_SCH311X_WDT is not set
 CONFIG_SPARSEMEM_STATIC=y
 CONFIG_SPARSE_IRQ=y
+CONFIG_SPECULATION_MITIGATIONS=y
 CONFIG_SRCU=y
 # CONFIG_STATIC_CALL_SELFTEST is not set
 CONFIG_SYSCTL_EXCEPTION_TRACE=y