ARM: pxa: fix regulator related build fail in magician_defconfig

commit 737f360d (linux-next)

  "regulator: Remove support for supplies specified by struct device"

deletes the field from the struct, but this platform was still trying
to set those fields.  Delete the assignments.

arch/arm/mach-pxa/magician.c:581: error: unknown field 'dev' specified in initializer
arch/arm/mach-pxa/magician.c:581: warning: initialization from incompatible pointer type
arch/arm/mach-pxa/magician.c:585: error: unknown field 'dev' specified in initializer
arch/arm/mach-pxa/magician.c:585: warning: initialization from incompatible pointer type

arch/arm/mach-pxa/hx4700.c:683: error: unknown field 'dev' specified in initializer
arch/arm/mach-pxa/hx4700.c:683: warning: initialization from incompatible pointer type
arch/arm/mach-pxa/hx4700.c:687: error: unknown field 'dev' specified in initializer
arch/arm/mach-pxa/hx4700.c:687: warning: initialization from incompatible pointer type

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>