litesdcard: Fix and regenerate Verilog

Fix the litex generate script to pass frequencies in Hz. Regenerate
the litesdcard Verilog for both Xilinx and Lattice. This fixes
litesdcard on my Nexys Video.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>

litesdcard/gen-src/generate.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # vendor:sysclk
-VENDORS="xilinx:100 lattice:48"
+VENDORS="xilinx:100e6 lattice:48e6"
 
 ME=$(realpath $0)
 echo ME=$ME