linux: Update version from 4.14.4 to 4.14.5

Announcement and change-log are available online [1][2].

Enable support for USB audio and USB MIDI devices.

```
$ diff -u /boot/config-4.14.4.mx64.192 /boot/config-4.14.5.mx64.194
--- /boot/config-4.14.4.mx64.192	2017-12-06 15:11:09.000000000 +0100
+++ /boot/config-4.14.5.mx64.194	2017-12-13 13:20:34.000000000 +0100
@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 4.14.4 Kernel Configuration
+# Linux/x86 4.14.5 Kernel Configuration
 #
 CONFIG_64BIT=y
 CONFIG_X86_64=y
@@ -52,7 +52,7 @@
 CONFIG_INIT_ENV_ARG_LIMIT=32
 CONFIG_CROSS_COMPILE=""
 # CONFIG_COMPILE_TEST is not set
-CONFIG_LOCALVERSION=".mx64.192"
+CONFIG_LOCALVERSION=".mx64.194"
 CONFIG_LOCALVERSION_AUTO=y
 CONFIG_HAVE_KERNEL_GZIP=y
 CONFIG_HAVE_KERNEL_BZIP2=y
@@ -330,6 +330,7 @@
 CONFIG_STRICT_KERNEL_RWX=y
 CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
 CONFIG_STRICT_MODULE_RWX=y
+CONFIG_ARCH_HAS_REFCOUNT=y
 # CONFIG_REFCOUNT_FULL is not set

 #
@@ -3244,7 +3245,19 @@
 CONFIG_SND_HDA_CORE=y
 CONFIG_SND_HDA_I915=y
 CONFIG_SND_HDA_PREALLOC_SIZE=64
-# CONFIG_SND_USB is not set
+CONFIG_SND_USB=y
+CONFIG_SND_USB_AUDIO=m
+# CONFIG_SND_USB_UA101 is not set
+# CONFIG_SND_USB_USX2Y is not set
+# CONFIG_SND_USB_CAIAQ is not set
+# CONFIG_SND_USB_US122L is not set
+# CONFIG_SND_USB_6FIRE is not set
+# CONFIG_SND_USB_HIFACE is not set
+# CONFIG_SND_BCD2000 is not set
+# CONFIG_SND_USB_POD is not set
+# CONFIG_SND_USB_PODHD is not set
+# CONFIG_SND_USB_TONEPORT is not set
+# CONFIG_SND_USB_VARIAX is not set
 # CONFIG_SND_SOC is not set
 CONFIG_SND_X86=y
 # CONFIG_HDMI_LPE_AUDIO is not set
```

[1] https://lkml.org/lkml/2017/12/10/145
[2] https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.5