mxs_ocotp: Shift the HBUS divider correctly

When the original HBUS divider value is retrieved in mxs_ocotp_scale_hclk()
for the purpose or restoring it back later, the value is not shifted by the
HBUS divider offset in that register. This is not a problem, since the shift
is zero on all MXS hardware. Add the shift anyway, for completeness and in
case FSL ever decides to re-use this driver on future designs.

Signed-off-by: Chris Smith <chris@zxdesign.info>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>

drivers/misc/mxs_ocotp.c

@@ -152,6 +152,7 @@ static int mxs_ocotp_scale_hclk(bool enter, uint32_t *val)
 		/* Return the original HCLK clock speed. */
 		*val = readl(&clkctrl_regs->hw_clkctrl_hbus);
 		*val &= CLKCTRL_HBUS_DIV_MASK;
+		*val >>= CLKCTRL_HBUS_DIV_OFFSET;
 
 		/* Scale the HCLK to 454/19 = 23.9 MHz . */
 		scale_val = (~19) << CLKCTRL_HBUS_DIV_OFFSET;