Enable si5341 driver is the main chip for providing preprogrammed clocks
for the whole platform.

 # cat /sys/kernel/debug/clk/clk_summary
...
 refhdmi                              1        1        0   114285000          0     0  50000
    xtal_0                            0        0        0   114285000          0     0  50000
       pll_0                          0        0        0 40731174000000          0     0  50000
          clk1_0                      0        0        0    27000000          0     0  50000
          clk0_0                      0        0        0    27000000          0     0  50000
 ref48M                               1        2        0    48000000          0     0  50000
    si5341                            0        4        0    14000000          0     0  50000
       clock-generator.N4             0        0        0           0          0     0  50000
       clock-generator.N3             0        1        0   733260000          0     0  50000
          clock-generator.9           0        1        0    33330000          0     0  50000
       clock-generator.N2             0        1        0   104000000          0     0  50000
          clock-generator.2           0        1        0    26000000          0     0  50000
       clock-generator.N1             0        2        0   594000000          0     0  50000
          clock-generator.7           0        1        0    74250000          0     0  50000
          clock-generator.0           0        1        0    27000000          0     0  50000
       clock-generator.N0             0        4        0  1000000000          0     0  50000
          clock-generator.8           0        0        0           0          0     0  50000
          clock-generator.6           0        1        0   125000000          0     0  50000
          clock-generator.5           0        1        0   100000000          0     0  50000
          clock-generator.4           0        1        0   100000000          0     0  50000
          clock-generator.3           0        1        0   125000000          0     0  50000
          clock-generator.1           0        0        0           0          0     0  50000
...
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/b93f13297684704a60e8d7274009a20aa98d14f7.1611224800.git.michal.simek@xilinx.com