[mipsel/mips/config.loongson-2f] Disable VIDEO_CX23885, VIDEO_IVTV, VIDEO_CX231XX, VIDEO_PVRUSB2 (fixes FTBFS).

This workaround the failed compilation of cx25840-core.c:

| {standard input}: Assembler messages:
| {standard input}:583: Error: branch out of range
| {standard input}:636: Error: branch out of range
| {standard input}:40094: Error: branch out of range

These are caused by the -Wa,-mfix-loongson2f-jump, which replaces the
"jalr t9" instruction by the "or t9, t9, 0x80000000; jalr t9"
instructions, thus causing an increase in code size.

This is probably the best way to workaround the FTBFS, especially given
that the loongson-2e/2f flavour are likely going to be removed for
stretch.

debian/changelog

@@ -1,5 +1,6 @@
 linux (4.5-1~exp2) UNRELEASED; urgency=medium
 
+  [ Ben Hutchings ]
   * mm: exclude ZONE_DEVICE from GFP_ZONE_TABLE
   * mm: ZONE_DEVICE depends on SPARSEMEM_VMEMMAP
   * [amd64] Re-enable ZONE_DMA and sound drivers that depend on it
@@ -9,6 +10,10 @@ linux (4.5-1~exp2) UNRELEASED; urgency=medium
   * Merge linux-tools source package into linux
     (Closes: #550379, #573483, #816500)
 
+  [ Aurelien Jarno ]
+  * [mipsel/mips/config.loongson-2f] Disable VIDEO_CX23885, VIDEO_IVTV,
+    VIDEO_CX231XX, VIDEO_PVRUSB2 (fixes FTBFS).
+
  -- Ben Hutchings <ben@decadent.org.uk>  Fri, 25 Mar 2016 13:43:57 +0000
 
 linux-tools (4.5-1~exp1) experimental; urgency=medium

debian/config/kernelarch-mips/config.loongson-2f

@@ -43,6 +43,26 @@ CONFIG_LOONGSON2_CPUFREQ=m
 ##
 CONFIG_INPUT_TOUCHSCREEN=y
 
+##
+## file: drivers/media/pci/cx23885/Kconfig
+##
+# CONFIG_VIDEO_CX23885 is not set
+
+##
+## file: drivers/media/pci/ivtv/Kconfig
+##
+# CONFIG_VIDEO_IVTV is not set
+
+##
+## file: drivers/media/usb/cx231xx/Kconfig
+##
+# CONFIG_VIDEO_CX231XX is not set
+
+##
+## file: drivers/media/usb/pvrusb2/Kconfig
+##
+# CONFIG_VIDEO_PVRUSB2 is not set
+
 ##
 ## file: drivers/net/ethernet/amd/Kconfig
 ##