Upgrade to 5.13.4.arch1.

PKGBUILD:
Add C7E7849466FE2358343588377258734B41C31549 as additional recognized valid PGP
key, as heftig might not be able to prepare releases and package for a while.

config:
Consolidate with defaults for 5.13.4 based on previous config.
Update CONFIG_LSM to order landlock before lockdown and re-add bpf, as the
issue discussed in https://bugs.archlinux.org/task/71270 seems to have been a
user-error (using obsolete kernel parameters).

config

@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 5.13.1-arch1 Kernel Configuration
+# Linux/x86 5.13.4-arch1 Kernel Configuration
 #
 CONFIG_CC_VERSION_TEXT="gcc (GCC) 11.1.0"
 CONFIG_CC_IS_GCC=y
@@ -2298,7 +2298,6 @@ CONFIG_MTD_BLOCK=m
 # CONFIG_SSFDC is not set
 # CONFIG_SM_FTL is not set
 # CONFIG_MTD_OOPS is not set
-CONFIG_MTD_PSTORE=m
 # CONFIG_MTD_SWAP is not set
 # CONFIG_MTD_PARTITIONED_MASTER is not set
 
@@ -3808,9 +3807,14 @@ CONFIG_IEEE802154_CA8210=m
 # CONFIG_IEEE802154_CA8210_DEBUGFS is not set
 CONFIG_IEEE802154_MCR20A=m
 CONFIG_IEEE802154_HWSIM=m
+
+#
+# Wireless WAN
+#
 CONFIG_WWAN=y
-CONFIG_WWAN_CORE=m
 CONFIG_MHI_WWAN_CTRL=m
+# end of Wireless WAN
+
 CONFIG_XEN_NETDEV_FRONTEND=m
 CONFIG_XEN_NETDEV_BACKEND=m
 CONFIG_VMXNET3=m
@@ -7829,7 +7833,7 @@ CONFIG_EDAC_SBRIDGE=m
 CONFIG_EDAC_SKX=m
 CONFIG_EDAC_I10NM=m
 CONFIG_EDAC_PND2=m
-CONFIG_EDAC_IGEN6=m
+# CONFIG_EDAC_IGEN6 is not set
 CONFIG_RTC_LIB=y
 CONFIG_RTC_MC146818_LIB=y
 CONFIG_RTC_CLASS=y
@@ -9167,7 +9171,6 @@ CONFIG_IPACK_BUS=m
 CONFIG_BOARD_TPCI200=m
 CONFIG_SERIAL_IPOCTAL=m
 CONFIG_RESET_CONTROLLER=y
-CONFIG_RESET_BRCMSTB_RESCAL=y
 CONFIG_RESET_TI_SYSCON=m
 
 #
@@ -9556,11 +9559,6 @@ CONFIG_PSTORE_COMPRESS_DEFAULT="zstd"
 # CONFIG_PSTORE_PMSG is not set
 # CONFIG_PSTORE_FTRACE is not set
 CONFIG_PSTORE_RAM=m
-CONFIG_PSTORE_ZONE=m
-CONFIG_PSTORE_BLK=m
-CONFIG_PSTORE_BLK_BLKDEV=""
-CONFIG_PSTORE_BLK_KMSG_SIZE=64
-CONFIG_PSTORE_BLK_MAX_REASON=2
 # CONFIG_SYSV_FS is not set
 CONFIG_UFS_FS=m
 # CONFIG_UFS_FS_WRITE is not set
@@ -9768,7 +9766,7 @@ CONFIG_SECURITY_LANDLOCK=y
 # CONFIG_DEFAULT_SECURITY_TOMOYO is not set
 # CONFIG_DEFAULT_SECURITY_APPARMOR is not set
 CONFIG_DEFAULT_SECURITY_DAC=y
-CONFIG_LSM="lockdown,landlock,yama"
+CONFIG_LSM="landlock,lockdown,yama,bpf"
 
 #
 # Kernel hardening options
@@ -10230,6 +10228,8 @@ CONFIG_DEBUG_INFO=y
 # CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT is not set
 CONFIG_DEBUG_INFO_DWARF4=y
 CONFIG_DEBUG_INFO_BTF=y
+CONFIG_PAHOLE_HAS_SPLIT_BTF=y
+CONFIG_DEBUG_INFO_BTF_MODULES=y
 # CONFIG_GDB_SCRIPTS is not set
 CONFIG_FRAME_WARN=2048
 CONFIG_STRIP_ASM_SYMS=y