MPC837x: set i2c1_clk

Running on mpc837x without CONFIG_FSL_ESDHC leads to
 i2c1_clk not being set at all. It is bound to clock
 of encryption module. fix this.

Signed-off-by: Andre Schwarz <andre.schwarz@matrix-vision.de>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

arch/powerpc/cpu/mpc83xx/speed.c

@@ -327,6 +327,8 @@ int get_clocks(void)
 	i2c1_clk = enc_clk;
 #elif defined(CONFIG_FSL_ESDHC)
 	i2c1_clk = sdhc_clk;
+#elif defined(CONFIG_MPC837x)
+	i2c1_clk = enc_clk;
 #endif
 #if !defined(CONFIG_MPC832x)
 	i2c2_clk = csb_clk; /* i2c-2 clk is equal to csb clk */