clk: mb86s7x: Drop non-building driver

clk: mb86s7x: Drop non-building driver

It fails to build once we introduce the ARCH_MB86S7X Kconfig symbol:

  drivers/clk/clk-mb86s7x.c:27:10: fatal error: soc/mb86s7x/scb_mhu.h: No such file or directory
   #include <soc/mb86s7x/scb_mhu.h>
            ^~~~~~~~~~~~~~~~~~~~~~~
  compilation terminated.

And when commenting out that line, we get:

  drivers/clk/clk-mb86s7x.c: In function 'crg_gate_control':
  drivers/clk/clk-mb86s7x.c:72:8: error: implicit declaration of function 'mb86s7x_send_packet' [-Werror=implicit-function-declaration]
    ret = mb86s7x_send_packet(CMD_PERI_CLOCK_GATE_SET_REQ,
          ^~~~~~~~~~~~~~~~~~~
  drivers/clk/clk-mb86s7x.c:72:28: error: 'CMD_PERI_CLOCK_GATE_SET_REQ' undeclared (first use in this function)
    ret = mb86s7x_send_packet(CMD_PERI_CLOCK_GATE_SET_REQ,
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~
  drivers/clk/clk-mb86s7x.c:72:28: note: each undeclared identifier is reported only once for each function it appears in
  drivers/clk/clk-mb86s7x.c: In function 'crg_rate_control':
  drivers/clk/clk-mb86s7x.c:116:10: error: 'CMD_PERI_CLOCK_RATE_SET_REQ' undeclared (first use in this function)
     code = CMD_PERI_CLOCK_RATE_SET_REQ;
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
  drivers/clk/clk-mb86s7x.c:121:10: error: 'CMD_PERI_CLOCK_RATE_GET_REQ' undeclared (first use in this function); did you mean 'CMD_PERI_CLOCK_RATE_SET_REQ'?
     code = CMD_PERI_CLOCK_RATE_GET_REQ;
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
            CMD_PERI_CLOCK_RATE_SET_REQ
  drivers/clk/clk-mb86s7x.c: In function 'mhu_cluster_rate':
  drivers/clk/clk-mb86s7x.c:276:10: error: 'CMD_CPU_CLOCK_RATE_GET_REQ' undeclared (first use in this function)
     code = CMD_CPU_CLOCK_RATE_GET_REQ;
            ^~~~~~~~~~~~~~~~~~~~~~~~~~
  drivers/clk/clk-mb86s7x.c:278:10: error: 'CMD_CPU_CLOCK_RATE_SET_REQ' undeclared (first use in this function); did you mean 'CMD_CPU_CLOCK_RATE_GET_REQ'?
     code = CMD_CPU_CLOCK_RATE_SET_REQ;
            ^~~~~~~~~~~~~~~~~~~~~~~~~~
            CMD_CPU_CLOCK_RATE_GET_REQ
  cc1: some warnings being treated as errors
  scripts/Makefile.build:302: recipe for target
  'drivers/clk/clk-mb86s7x.o' failed
  make[2]: *** [drivers/clk/clk-mb86s7x.o] Error 1

Remove the driver for now.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>