gnu: libftdi: Build ftdi_eeprom.

* gnu/packages/libftdi.scm (libftdi)[arguments]<#:configure-flags>: Add
"-DCMAKE_INSTALL_DOCDIR".
[native-inputs]: Add with pkg-config.
[inputs]: Add with libconfuse.
[license]: Add GPL version 2.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/libftdi.scm

@@ -24,7 +24,9 @@
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
   #:use-module (gnu packages)
-  #:use-module (gnu packages libusb))
+  #:use-module (gnu packages libusb)
+  #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages textutils))
 
 (define-public libftdi
   (package
@@ -42,8 +44,14 @@
     (arguments
      (list
       #:configure-flags
-      #~(list "-DEXAMPLES=OFF"
+      #~(list (string-append "-DCMAKE_INSTALL_DOCDIR="
+                             #$output "/share/doc/" #$name "-" #$version)
+              "-DEXAMPLES=OFF"
               "-DLIB_SUFFIX=''")))      ; place libraries in /lib, not /lib64
+    (native-inputs
+     (list pkg-config))
+    (inputs
+     (list libconfuse))
     (propagated-inputs
      (list libusb))                     ; required by libftdi1.pc
     (home-page "https://www.intra2net.com/en/developer/libftdi/")
@@ -51,4 +59,5 @@
     (description
      "libFTDI is a library to talk to FTDI chips: FT232BM, FT245BM, FT2232C,
 FT2232D, FT245R and FT232H including the popular bitbangmode.")
-    (license license:lgpl2.1)))
+    (license (list license:gpl2         ; ftdi_eeprom
+                   license:lgpl2.1))))  ; main library